Field of the Disclosure

[0001] The present disclosure relates to light fixtures and, more particularly, to light fixtures using light-emitting diodes (LEDs).

Background

[0002] In recent years, the use of light-emitting diodes (LEDs) in development of light fixtures for various common lighting purposes has increased, and this trend has accelerated as advances have been made in the field. Indeed, lighting applications which previously had typically been served by fixtures using what are known as high-intensity discharge (HID) lamps are now being served by LED light fixtures. Such lighting applications include, among a good many others, roadway lighting, factory lighting, parking lot lighting, and commercial building lighting.

[0003] High-luminance light fixtures using LED modules as a light source present certain challenges. One particular challenge for high-luminance LED light fixtures relates to serviceability. In many applications, LED modules are not as interchangeable as their legacy counterparts, such as HID lamps. In addition, for outdoor or wet locations, additional sealing of components may be required which has traditionally resulted in LED fixtures which are more difficult to service in the field.

Summary

[0004] An easily-serviced area light is provided. Area lights described herein use a modular fixture design to facilitate in-field serviceability and upgradeability of power, lighting, sensor, and other components. In particular, light fixtures include a housing with an integrated hinge to provide access to sub-assemblies and electrical components without removal of doors, access panels, or other large fixture parts. In this manner, various components can be easily serviced or upgraded, including power circuitry (e.g., light-emitting diode (LED) drivers and/or power converters) and a light engine (e.g., to provide a larger LED array). At least some components may be accessed for service without need for specialty or any tools. In addition, sub-components, such as a power outlet (e.g., a NEMA- rated outdoor receptacle), a sensor, etc., can be installed in-field without needing to replace main fixture components.

[0005] An exemplary embodiment provides a light fixture. The light fixture includes a main fixture housing enclosing power circuitry for at least one light emitter, wherein the main fixture housing is configured to be mounted to a structure. The light fixture further includes a weather-sealed light engine comprising the at least one light emitter, wherein the light engine is pivotably connected to the main fixture housing and moveable with respect to the power circuitry to provide service access thereto while the light engine remains secured with respect to the main fixture housing.

[0006] Another exemplary embodiment provides a light fixture. The light fixture includes a fixture housing enclosing power circuitry and a light-emitting arrangement operatively connected to the power circuitry and remaining movably secured with respect to the fixture housing while providing service access to the power circuitry.

[0007] Those skilled in the art will appreciate the scope of the present disclosure and realize additional aspects thereof after reading the following detailed description of the preferred embodiments in association with the accompanying drawing figures.

Brief Description of the Drawing Figures

[0008] The accompanying drawing figures incorporated in and forming a part of this specification illustrate several aspects of the disclosure, and together with the description serve to explain the principles of the disclosure.

[0009] Figure 1 A is a top isometric view of a pole-mounted light fixture according to embodiments described herein.

[0010] Figure 1 B is a bottom isometric view of the pole-mounted light fixture of Figure 1A. [0011] Figure 2 is a schematic diagram of an exemplary embodiment of the light fixture of Figure 1 A.

[0012] Figure 3 is an exploded view of the light fixture of Figure 2.

[0013] Figure 4 is a cross-sectional view of the light fixture of Figure 2.

[0014] Figure 5A is a side view of an exemplary small pole mounting adapter for the light fixture of Figures 2-4.

[0015] Figure 5B is a side view of an exemplary large pole mounting adapter for the light fixture of Figures 2-4.

[0016] Figure 5C is a side view of an exemplary adjustable mounting adapter for the light fixture of Figures 2-4.

[0017] Figure 6A is a side view of the pole-mounted light fixture of Figure 1 A using the small pole mounting adapter of Figure 5A.

[0018] Figure 6B is an isometric view of the pole-mounted light fixture of Figure 1 A using the small pole mounting adapter of Figure 5A.

[0019] Figure 6C illustrates attachment of the light fixture of Figures 2-4 to the small pole mounting adapter of Figure 5A.

[0020] Figure 7A is a side view of the pole-mounted light fixture of Figure 1 A using the large pole mounting adapter of Figure 5B.

[0021] Figure 7B is an isometric view of the pole-mounted light fixture of Figure 7A.

[0022] Figure 8A is a side view of the light fixture of Figures 2-4 mounted to a structure with the adjustable mounting adapter of Figure 5C.

[0023] Figure 8B is an isometric view of the light fixture of Figure 8A.

[0024] Figure 9A is a bottom view of an exemplary super-small light engine of the light fixture of Figures 2-4.

[0025] Figure 9B is a bottom view of an exemplary small light engine of the light fixture of Figures 2-4.

[0026] Figure 9C is a bottom view of an exemplary medium light engine of the light fixture of Figures 2-4.

[0027] Figure 9D is a bottom view of an exemplary large light engine of the light fixture of Figures 2-4. [0028] Figure 9E is a bottom view of an exemplary extra-large light engine of the light fixture of Figures 2-4.

[0029] Figure 9F is a bottom view of an exemplary super-large light engine of the light fixture of Figures 2-4.

[0030] Figure 10A is a cross-sectional view of a light engine according to any of the embodiments of Figures 9A-9F.

[0031 ] Figure 10B is an exploded view of the light engine of Figure 10A.

[0032] Figure 11 A illustrates a small fixture housing for the super-small light engine, small light engine, or medium light engine.

[0033] Figure 11 B illustrates a large fixture housing for the large light engine or extra-large light engine.

[0034] Figure 11 C illustrates a super-large fixture housing for the super-large light engine.

[0035] Figure 12A is an open bottom view of the small fixture housing with small power circuitry for powering the super-small light engine, small light engine, or medium light engine.

[0036] Figure 12B is an open bottom view of the large fixture housing with large power circuitry for powering the large light engine or extra-large light engine.

[0037] Figure 12C is an open bottom view of the large fixture housing with extra-large power circuitry for powering the large light engine or extra-large light engine.

[0038] Figure 12D is an open bottom view of the large fixture housing with super-large power circuitry for powering the super-large light engine.

[0039] Figure 13A is a bottom isometric view of the light fixture of Figures 2-4 with an exemplary backlight shield.

[0040] Figure 13B is a side view of the light fixture of Figure 13A.

[0041] Figure 13C is a top isometric view of the light fixture of Figure 13A.

[0042] Figure 14A is a bottom isometric view of the light fixture of Figures 2-4 with another exemplary backlight shield.

[0043] Figure 14B is a side view of the light fixture of Figure 14A. [0044] Figure 14C is a top isometric view of the light fixture of Figure 14A.

[0045] Figure 15 is a schematic diagram of the light fixture of Figures 2-4 which can be mounted in a first orientation via a pole mounting adapter or a second orientation via an adjustable mounting adapter.

[0046] Figure 16A is a bottom isometric view of a light fixture with the supersmall light engine of Figure 9A or the small light engine of Figure 9B mounted with the pole mounting adapter of Figures 5A and 5B.

[0047] Figure 16B is a side view of the light fixture of Figure 16A.

[0048] Figure 16C is a top isometric view of the light fixture of Figure 16A.

[0049] Figure 17A is a bottom isometric view of a light fixture with the medium light engine of Figure 9C mounted with the pole mounting adapter of Figures 5A and 5B.

[0050] Figure 17B is a side view of the light fixture of Figure 17A.

[0051] Figure 17C is a top isometric view of the light fixture of Figure 17A.

[0052] Figure 18A is a bottom isometric view of a light fixture with the large light engine of Figure 9D mounted with the pole mounting adapter of Figures 5A and 5B.

[0053] Figure 18B is a side view of the light fixture of Figure 18A.

[0054] Figure 18C is a top isometric view of the light fixture of Figure 18A.

[0055] Figure 19A is a bottom isometric view of a light fixture with the extralarge light engine of Figure 9E mounted with the pole mounting adapter of Figures 5A and 5B.

[0056] Figure 19B is a side view of the light fixture of Figure 19A.

[0057] Figure 19C is a top isometric view of the light fixture of Figure 19A.

[0058] Figure 20A is a bottom isometric view of a light fixture with the superlarge light engine of Figure 9F mounted with the pole mounting adapter of Figures 5A and 5B.

[0059] Figure 20B is a side view of the light fixture of Figure 20A.

[0060] Figure 20C is a top isometric view of the light fixture of Figure 20A. [0061] Figure 21 A is a top isometric view of a light fixture with the super-small light engine of Figure 9A or the small light engine of Figure 9B mounted with the adjustable mounting adapter of Figure 5C.

[0062] Figure 21 B is a bottom isometric view of the light fixture of Figure 21 A.

[0063] Figure 21 C is a side view of the light fixture of Figure 21 A.

[0064] Figure 22A is a top isometric view of a light fixture with the medium light engine of Figure 9C mounted with the adjustable mounting adapter of Figure 5C.

[0065] Figure 22B is a bottom isometric view of the light fixture of Figure 22A.

[0066] Figure 22C is a side view of the light fixture of Figure 22A.

[0067] Figure 23A is a top isometric view of a light fixture with the large light engine of Figure 9D mounted with the adjustable mounting adapter of Figure 5C.

[0068] Figure 23B is a bottom isometric view of the light fixture of Figure 23A.

[0069] Figure 23C is a side view of the light fixture of Figure 23A.

[0070] Figure 24A is a top isometric view of a light fixture with the extra-large light engine of Figure 9E mounted with the adjustable mounting adapter of Figure 5C.

[0071] Figure 24B is a bottom isometric view of the light fixture of Figure 24A.

[0072] Figure 24C is a side view of the light fixture of Figure 24A.

[0073] Figure 25A is a top isometric view of a light fixture with the super-large light engine of Figure 9F mounted with the adjustable mounting adapter of Figure 5C.

[0074] Figure 25B is a bottom isometric view of the light fixture of Figure 25A.

[0075] Figure 25C is a side view of the light fixture of Figure 25A.

[0076] Figure 26A illustrates attachment of the small pole mounting adapter of

Figure 5A to a pole.

[0077] Figure 26B illustrates attachment of the large pole mounting adapter of Figure 5B to a pole.

[0078] Figure 27A illustrates attachment of the mounting adapter to a structure.

[0079] Figure 27B illustrates the attached mounting adapter of Figure 27A. [0080] Figure 27C is a side view illustrating attachment of the light fixture to the mounting adapter of Figure 27B.

[0081] Figure 27D is a top isometric side view illustrating attachment of the light fixture to the mounting adapter of Figure 27C.

[0082] Figure 27E is a bottom isometric view of the light fixture attached to the mounting adapter of Figure 27D.

[0083] Figure 27F is a bottom isometric view of the mounting adapter and light fixture of Figure 27E illustrating a fixture power connector and mains power conductor.

[0084] Figure 27G is a bottom isometric view of the mounting adapter and light fixture of Figure 27F illustrating connection of the fixture power connector to the mains power conductor.

[0085] Figure 27H illustrates securing the light fixture to the mounting adapter of Figure 27G with fasteners.

[0086] Figure 27I illustrates securing a mounting adapter cover to the mounting adapter of Figure 27H with fasteners.

[0087] Figure 27J is a side view of the installed light fixture of Figure 27I.

[0088] Figure 28A illustrates removal of fasteners for the bottom cover of the main fixture housing for servicing of the light fixture.

[0089] Figure 28B illustrates pivoting of the light engine of Figure 28A for servicing of components in the main fixture housing.

[0090] Figure 28C illustrates the main fixture housing of Figure 28B open for servicing of components without removing the light engine.

[0091] Figure 28D illustrates removal of the light engine from the main fixture housing of Figure 28C.

Detailed Description

[0092] The embodiments set forth below represent the necessary information to enable those skilled in the art to practice the embodiments and illustrate the best mode of practicing the embodiments. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure and the accompanying claims.

[0093] It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. [0094] It will be understood that when an element such as a layer, region, or substrate is referred to as being "on" or extending "onto" another element, it can be directly on or extend directly onto the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or extending "directly onto" another element, there are no intervening elements present. Likewise, it will be understood that when an element such as a layer, region, or substrate is referred to as being "over" or extending "over" another element, it can be directly over or extend directly over the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly over" or extending "directly over" another element, there are no intervening elements present. It will also be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.

[0095] Relative terms such as "below" or "above" or "upper" or "lower" or "horizontal" or "vertical" may be used herein to describe a relationship of one element, layer, or region to another element, layer, or region as illustrated in the Figures. It will be understood that these terms and those discussed above are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures.

[0096] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" when used herein specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

[0097] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0098] A modular and easily serviced area light is provided. Area lights described herein use a modular fixture design to facilitate in-field serviceability and upgradeability of power, lighting, sensor, and other components. In particular, light fixtures include a housing with an integrated hinge to provide access to sub-assemblies and electrical components without removal of doors, access panels, or other large fixture parts. In this manner, various components can be easily serviced or upgraded, including power circuitry (e.g., light-emitting diode (LED) drivers and/or power converters) and a light engine (e.g., to provide a larger LED array). At least some components may be accessed for service without need for specialty or any tools. In addition, sub-components, such as a power outlet (e.g., a NEMA-rated outdoor receptacle), a sensor, etc., can be installed in-field without needing to replace main fixture components. I. Modular Light Fixture and Components

[0099] Figure 1 A is a top isometric view of a pole-mounted light fixture 10 according to embodiments described herein. The light fixture 10 includes an optical assembly 12 and a main fixture housing 14. The light fixture 10 is designed to mount to a pole 16 or other structure to provide area lighting, flood lighting, pathway lighting, and so on, without the need for separately designed fixtures. In this regard, the light fixture 10 is modular and can be attached to numerous types of structures for different lighting applications using one or more different mounting adapters 18. In addition, the modular design of the light fixture 10 described herein provides for improved in-field serviceability as will be described further below.

[0100] Figure 1 B is a bottom isometric view of the pole-mounted light fixture 10 of Figure 1A. The optical assembly 12 includes a light engine 20 having an array of LEDs which emit light outward from the optical assembly 12 (e.g., downward in the illustrated example). In an exemplary aspect, the light fixture 10 is designed for outdoor and/or wet locations. Accordingly, one or more components of the light fixture 10 are weather-sealed, such as the light engine 20 and/or a compartment of the main fixture housing 14.

A. Light Fixture Components [0101] Figure 2 is a schematic diagram of an exemplary embodiment of the light fixture 10 of Figure 1 A. The light fixture 10 is modular, such that various components can be easily serviced, replaced, and/or upgraded. For example, the optical assembly 12 is pivotably connected to the main fixture housing 14 such that components in the main fixture housing 14 are serviceable without detaching the light engine 20.

[0102] The optical assembly 12 includes the light engine 20 and a cowling 22. The cowling 22 is attached to the light engine 20 and defines a thermal passage between the cowling 22 and a heat sink 24. In one aspect, the heat sink 24 provides structural rigidity for the optical assembly 12, and the cowling 22 is attached to the heat sink 24. In addition, the optical assembly 12 may be attached to the main fixture housing 14 via the heat sink 24.

[0103] The main fixture housing 14 attaches to a mounting adapter 18, which facilitates installation of the light fixture 12 on a structure, such as the pole 16 of Figures 1 A and 1 B, a building, a canopy, a ground mount, etc. In some embodiments, the light fixture 10 may be considered to include the mounting adapter 18. In other embodiments, the light fixture 10 and mounting adapter 18 are separate apparatuses.

[0104] The main fixture housing 14 houses power circuitry and other electronic components for the light fixture 10. As such, a fixture connector 26 provides an electrical connection to mains power (e.g., an alternating current (AC) line voltage). In one aspect, the mounting adapter 18 provides the mains power via a mains power conductor 28 which connects to the fixture connector 26. In some embodiments, the mounting adapter 18 may optionally include an outdoor power outlet 30, which connects to the mains power conductor 28 via an outlet connector 32.

[0105] Figure 3 is an exploded view of the light fixture 10 of Figure 2. The optical assembly 12 includes the light engine 20 and a cowling 22 attached to the light engine 20. The cowling 22 includes one or more thermal intake openings 34 and thermal exhaust openings 36 to facilitate air flow across the heat sink 24. The thermal intake opening(s) 34 are at a bottom edge of the cowling 22 and the thermal exhaust opening(s) 36 are at a top edge of the cowling 22 to facilitate heat extraction from the heat sink 24.

[0106] The light engine 20 emits light via at least one LED module 38 comprising an array of LED light sources. The LED module 38 is enclosed by the heat sink 24 and a lens 40. The LED module 38 is further thermally coupled to the heat sink 24. The heat sink 24 is a heat-conductive structure which includes an LED-supporting bottom surface and a top portion with a plurality of heatdissipating surfaces 42, which may be in the form of fins extending outward from a center of the heat sink 24. The thermal intake opening(s) 34 and thermal exhaust opening(s) 36 in the cowling 22 direct air flow to and along the heatdissipating surfaces 42.

[0107] The main fixture housing 14 includes an upper portion and a bottom cover 44 (e.g., a lower portion), which define a compartment enclosing components for driving the light engine 20, such as power circuitry 46, one or more sensors 48, and control circuitry. For example, an ambient light sensor 48 may be housed within the main fixture housing 14 (e.g., and at least partially disposed in the bottom cover 44) to control activation of the light engine 20. In an exemplary aspect, the compartment defined by the main fixture housing 14 and bottom cover 44 is weather-sealed to protect the power circuitry 46 and other components. In addition, as will be further illustrated below, the bottom cover 44 may be attached to the light engine 20 such that the power circuitry 46 is serviceable without detaching the light engine 20 from the light fixture 10. The main fixture housing 14 may further be sealed using grommets 50 or other appropriate means, such as at a connection to the light engine 20 and at the fixture connector 26.

[0108] The mounting adapter 18 may be weather-sealed or not, according to a desired application. As described above, the mounting adapter 18 includes a mains power conductor 28 to connect the fixture connector 26 to mains power and may optionally include an outdoor power outlet 30 and outlet connector 32. The mounting adapter 18 is configured to mount to a structure. In some embodiments, the mounting adapter 18 mates with a mounting bracket 52 to attach to the structure. A mounting adapter cover 54 may facilitate installation and allow access to the fixture connector 26 and outdoor power outlet 30 for servicing.

[0109] Figure 4 is a cross-sectional view of the light fixture 10 of Figure 2. The optical assembly 12 is pivotably attached to the main fixture housing 14, such as with a hinge 56. This makes the power circuitry 46 and other components in the main fixture housing 14 serviceable without detaching the light engine 20. The hinge 56 may include a first hinge component attached to the light engine 20 (e.g., formed on the heat sink 24) and a second hinge component attached to the main fixture housing 14 (e.g., formed on an outer surface of the main fixture housing 14).

[0110] In one aspect, the light fixture 10 is an outdoor and/or wet-location fixture. Accordingly, certain components of the light fixture 10 are weather- sealed, such as the light engine 20 and the main fixture housing 14. With regard to the light engine 20, the LED module 38 is weather-sealed between the heat sink 24 and the lens 40. The lens 40 may be sealed via a gasket, adhesive, or other appropriate means at a shaped edge 58 of the heat sink 24. The LED module 38 is electrically connected to the power circuitry 46 via a module connector 60. A grommet 50 about the module connector 60 can ensure the LED module 38 remains sealed from liquids and other elements.

[0111] The bottom cover 44 provides a weather-sealed compartment 62 within the main fixture housing 14. A gasket 64 facilitates this seal while allowing the bottom cover 44 to open as the light engine 20 pivots downward via the hinge 56. In addition, the grommets 50 about the module connector 60 and the fixture connector 26 maintain the seal when the bottom cover 44 is secured to the main fixture housing 14.

B. Modular Mounting Adapter

[0112] Figure 5A is a side view of an exemplary small pole mounting adapter 18a for the light fixture 10 of Figures 2-4. The small pole mounting adapter 18a may be appropriate to support smaller embodiments of the light fixture 10. The small pole mounting adapter 18a can be attached to a pole or similar structure to provide a secure mounting point and electrical connection for the main fixture housing 14.

[0113] Figure 5B is a side view of an exemplary large pole mounting adapter 18b for the light fixture 10 of Figures 2-4. The large pole mounting adapter 18b may be appropriate to support larger embodiments of the light fixture 10 and/or mounting in locations subject to greater external forces. The small pole mounting adapter 18a and large pole mounting adapter 18b are interchangeable, such that the light fixture 10 can be replaced without needing to change the mounting adapter 18a, 18b or the mounting adapter 18a, 18b can be replaced without needing to change the light fixture 10.

[0114] Figure 5C is a side view of an exemplary adjustable mounting adapter 18c for the light fixture 10 of Figures 2-4. The adjustable mounting adapter 18c may be appropriate for mounting the light fixture 10 in different orientations, such as a flood light, uplight, canopy light, or other application. Thus, each of the mounting adapters 18a to 18c is replaceable with another mounting adapter 18ato 18c configured for mounting to a different type of structure and/or in a different orientation.

[0115] Figure 6A is a side view of the pole-mounted light fixture 10 of Figure 1A using the small pole mounting adapter 18a of Figure 5A. Figure 6B is an isometric view of the pole-mounted light fixture 10 of Figure 1 A using the small pole mounting adapter 18a of Figure 5A. Figure 6C illustrates attachment of the light fixture 10 of Figures 2-4 to the small pole mounting adapter 18a of Figure 5A. The main fixture housing 14 and the small pole mounting adapter 18a have a keyhole-type interlocking structure to facilitate ease of installation and service. [0116] Figure 7A is a side view of the pole-mounted light fixture 10 of Figure 1A using the large pole mounting adapter 18b of Figure 5B. Figure 7B is an isometric view of the pole-mounted light fixture 10 of Figure 7A.

[0117] Figure 8A is a side view of the light fixture 10 of Figures 2-4 mounted to a structure with the adjustable mounting adapter 18c of Figure 5C. Figure 8B is an isometric view of the light fixture 10 of Figure 8A.

C. Modular Light Engine and Main Fixture Housing [0118] According to embodiments described herein, the light fixture 10 has a modular design such that various components are interchangeable and/or easily serviced or replaced. For example, the light fixture 10 supports multiple sizes of light engines 20, as illustrated in Figures 9A-9F. In this manner, a given light engine 20 is replaceable with a larger or smaller light engine 20 (or one having a different light intensity, color, power, etc.) without needing to replace the main fixture housing 14. [0119] Figure 9A is a bottom view of an exemplary super-small light engine 20a of the light fixture 10 of Figures 2-4. Figure 9B is a bottom view of an exemplary small light engine 20b of the light fixture 10 of Figures 2-4. Figure 9C is a bottom view of an exemplary medium light engine 20c of the light fixture 10 of Figures 2-4. Figure 9D is a bottom view of an exemplary large light engine 20d of the light fixture 10 of Figures 2-4. Figure 9E is a bottom view of an exemplary extra-large light engine 20e of the light fixture 10 of Figures 2-4. Figure 9F is a bottom view of an exemplary super-large light engine 20f of the light fixture 10 of Figures 2-4.

[0120] Figure 10A is a cross-sectional view of a light engine 20 according to any of the embodiments of Figures 9A-9F. Figure 10B is an exploded view of the light engine 20 of Figure 10A. The light engine 20 includes the LED module 38, which is mechanically and thermally coupled to the heat sink 24. A lens seal 66 (e.g., a gasket, adhesive, etc.) provides a weather-resistant seal between the lens 40 and the heat sink 24. The lens 40 may be formed of a transparent or translucent material and may be clear or diffuse. The LED module 38 includes an array of LEDs 68 disposed on a substrate, such as a printed circuit board (PCB) or flexible circuit board. In some embodiments, an optic assembly 70 is attached to the LED module 38, to diffuse or otherwise direct light emitted by the array of LEDs 68.

[0121 ] Figure 11 A illustrates a small fixture housing 14a for the super-small light engine 20a, small light engine 20b, or medium light engine 20c. Figure 11 B illustrates a large fixture housing 14b for the large light engine 20d or extra-large light engine 20e. Figure 11 C illustrates a super-large fixture housing 14c for the super-large light engine 20f. In one aspect, one main fixture housing 14a to 14c can support multiple sizes of light engine 20a to 20f. This is further illustrated with respect to Figures 12A-12D.

[0122] Figure 12A is an open bottom view of the small fixture housing 14a with small power circuitry 46a for powering the super-small light engine 20a, small light engine 20b, or medium light engine 20c. The small fixture housing 14a may enclose the small power circuitry 46a and control circuitry 72. The small power circuitry 46a, in turn, may support multiple sizes of light engine 20a to 20c. As such, the super-small light engine 20a is replaceable with another of the same size, a small light engine 20b, or a medium light engine 20c without needing to replace the small fixture housing 14a or the small power circuitry 46a. In some embodiments, the small power circuitry 46a may not support the power loads of each of the super-small light engine 20a, small light engine 20b, or medium light engine 20c, but may be replaceable with appropriate power circuitry having the same or a similar footprint as the small power circuitry 46a.

[0123] Figure 12B is an open bottom view of the large fixture housing 14b with large power circuitry 46b for powering the large light engine 20d or extra-large light engine 20e. Figure 12C is an open bottom view of the large fixture housing 14b with extra-large power circuitry 46c for powering the large light engine 20d or extra-large light engine 20e. The large fixture housing 14b may enclose the small power circuitry 46a, the control circuitry 72, one or more sensor circuits 74, and additional components. In some embodiments, the large power circuitry 46b can support multiple sizes of light engine 20d, 20e. In other embodiments, the extralarge power circuitry 46c may be needed, such as to support higher power light engines 20d, 20e.

[0124] Figure 12D is an open bottom view of the super-large fixture housing 14c with super-large power circuitry 46d for powering the super-large light engine 20f. The super-large fixture housing 14c may enclose the super-large power circuitry 46d, the control circuitry 72, one or more sensor circuits 74, and additional components. In some examples, the super-large fixture housing 14c and super-large power circuitry 46d support other sizes of light engines, such as the smaller light engines 20a to 20e.

D. Optional Features

[0125] As described above, the light fixture 10 may optionally include an outdoor power outlet 30 disposed on an outer surface, which may be integrated with the light fixture 10 or installed in-field. For example, the outdoor power outlet 30 may be integrated in the mounting adapter 18, or the mounting adapter 18 may include an opening for later installation of the outdoor power outlet 30. In some embodiments, the outdoor power outlet 30 is otherwise integrated into the light fixture 10, such as in a separate compartment of the main fixture housing 14 from the power circuitry 46. In an exemplary aspect, the outdoor power outlet 30 is an outdoor-rated NEMA receptacle (e.g., as defined under the ANSI C136 standard), which may provide electrical and mechanical interconnection for power and/or control.

[0126] In addition, the main fixture housing 14 may optionally accommodate one or more sensors 48 and sensor circuits 74, such as ambient light sensors, occupancy sensors, image sensors, and other environmental sensors. These sensors may control an aspect of the operation of the light engine 20, such as to activate the LED module 38, deactivate the LED module 38, adjust an intensity level or color of emitted light, and so on.

[0127] Figure 13A is a bottom isometric view of the light fixture 10 of Figures 2-4 with an exemplary backlight shield 76a. Figure 13B is a side view of the light fixture 10 of Figure 13A. Figure 13C is a top isometric view of the light fixture 10 of Figure 13A. The backlight shield 76a may control light spillage from the light fixture 10 and may be integrated into or removable from the cowling 22.

[0128] Figure 14A is a bottom isometric view of the light fixture 10 of Figures 2-4 with another exemplary backlight shield 76b. Figure 14B is a side view of the light fixture 10 of Figure 14A. Figure 14C is a top isometric view of the light fixture 10 of Figure 14A. The backlight shield 76b may provide a different light distribution according to application.

II. Area and Flood Light Embodiments

[0129] Figure 15 is a schematic diagram of the light fixture 10 of Figures 2-4 which can be mounted in a first orientation via a pole mounting adapter 18a, 18b or a second orientation via an adjustable mounting adapter 18c. The modular light fixture 10 described herein can be mounted for various applications through these and other mounting adapters 18a to 18c. For example, the pole mounting adapter 18a, 18b may be used for a pole-mounted application while the adjustable mounting adapter 18c may be used for a flood light application.

A. Pole-Mounted Fixtures

[0130] Figure 16A is a bottom isometric view of a light fixture 10a with the super-small light engine 20a of Figure 9A or the small light engine 20b of Figure 9B mounted with the pole mounting adapter 18a, 18b of Figures 5A and 5B. Figure 16B is a side view of the light fixture 10a of Figure 16A. Figure 16C is a top isometric view of the light fixture 10a of Figure 16A.

[0131 ] Figure 17A is a bottom isometric view of a light fixture 10a with the medium light engine 20c of Figure 9C mounted with the pole mounting adapter 18a, 18b of Figures 5A and 5B. Figure 17B is a side view of the light fixture 10a of Figure 17A. Figure 17C is a top isometric view of the light fixture 10a of Figure 17A.

[0132] Figure 18A is a bottom isometric view of a light fixture 10a with the large light engine 20d of Figure 9D mounted with the pole mounting adapter 18a, 18b of Figures 5A and 5B. Figure 18B is a side view of the light fixture 10a of Figure 18A. Figure 18C is a top isometric view of the light fixture 10a of Figure 18A.

[0133] Figure 19A is a bottom isometric view of a light fixture 10a with the extra-large light engine 20e of Figure 9E mounted with the pole mounting adapter 18a, 18b of Figures 5A and 5B. Figure 19B is a side view of the light fixture 10a of Figure 19A. Figure 19C is a top isometric view of the light fixture 10a of Figure 19A.

[0134] Figure 20A is a bottom isometric view of a light fixture 10a with the super-large light engine 20f of Figure 9F mounted with the pole mounting adapter 18a, 18b of Figures 5A and 5B. Figure 20B is a side view of the light fixture 10a of Figure 20A. Figure 20C is a top isometric view of the light fixture 10a of Figure 20A. B. Adjustable Fixtures

[0135] Figure 21 A is a top isometric view of a light fixture 10b with the supersmall light engine 20a of Figure 9A or the small light engine 20b of Figure 9B mounted with the adjustable mounting adapter 18c of Figure 5C. Figure 21 B is a bottom isometric view of the light fixture 10b of Figure 21 A. Figure 21 C is a side view of the light fixture 10b of Figure 21 A.

[0136] Figure 22A is a top isometric view of a light fixture 10b with the medium light engine 20c of Figure 9C mounted with the adjustable mounting adapter 18c of Figure 5C. Figure 22B is a bottom isometric view of the light fixture 10b of Figure 22A. Figure 22C is a side view of the light fixture 10b of Figure 22A.

[0137] Figure 23A is a top isometric view of a light fixture 10b with the large light engine 20d of Figure 9D mounted with the adjustable mounting adapter 18c of Figure 5C. Figure 23B is a bottom isometric view of the light fixture 10b of Figure 23A. Figure 23C is a side view of the light fixture 10b of Figure 23A.

[0138] Figure 24A is a top isometric view of a light fixture 10b with the extralarge light engine 20e of Figure 9E mounted with the adjustable mounting adapter 18c of Figure 5C. Figure 24B is a bottom isometric view of the light fixture 10b of Figure 24A. Figure 24C is a side view of the light fixture 10b of Figure 24A.

[0139] Figure 25A is a top isometric view of a light fixture 10b with the superlarge light engine 20f of Figure 9F mounted with the adjustable mounting adapter 18c of Figure 5C. Figure 25B is a bottom isometric view of the light fixture 10b of Figure 25A. Figure 25C is a side view of the light fixture 10b of Figure 25A.

[0140] It should be understood that the embodiments of Figures 16A-25C are exemplary in nature and a number of different fixture types, mounting types, and lighting applications are contemplated within the present disclosure.

III. Installation of Light Fixtures

[0141] An example of an installation is described below with respect to a polemounted embodiment of the light fixture 10. [0142] Figure 26A illustrates attachment of the small pole mounting adapter 18a of Figure 5A to a pole 16. Figure 26B illustrates attachment of the large pole mounting adapter 18b of Figure 5B to a pole 16. For pole-mounting applications, the mounting adapter 18a, 18b can be attached to the pole 16 with the mounting bracket 52. In one aspect, the same mounting bracket 52 can be used for both the small pole mounting adapter 18a and the large pole mounting adapter 18b. [0143] The mounting bracket 52 is placed inside the pole 16. Mounting bolts 78 or other fasteners extend through the mounting bracket 52, through openings in the pole 16, and into the small pole mounting adapter 18a or large pole mounting adapter 18b. The mounting bracket 52 includes a fixed mounting hole 80 and an adjustable mounting hole 82. Both mounting bolts 78 may attach to the small pole mounting adapter 18a at fixed points, but one mounting bolt 78 may attach to the large pole mounting adapter 18b at multiple points.

[0144] Figure 27A illustrates attachment of the mounting adapter 18 to a structure. In this example, the mounting adapter 18 is attached to the pole 16. The mains power conductor 28 is fed through an opening in the pole 16 (e.g., between the mounting bolts 78) for connection to a line voltage, and the mounting adapter 18 is aligned with and attached to the mounting bracket 52 (not shown) with the mounting bolts 78. Figure 27B illustrates the attached mounting adapter 18 of Figure 27A.

[0145] Figure 27C is a side view illustrating attachment of the light fixture 10 to the mounting adapter 18 of Figure 27B. Figure 27D is a top isometric side view illustrating attachment of the light fixture 10 to the mounting adapter 18 of Figure 27C. The light fixture 10 is attached to the mounting adapter 18 at an end of the main fixture housing 14 by sliding the keyhole-type interlocking structure of the main fixture housing 14 onto corresponding structure on the mounting adapter 18.

[0146] Figure 27E is a bottom isometric view of the light fixture 10 attached to the mounting adapter 18 of Figure 27D. Figure 27F is a bottom isometric view of the mounting adapter 18 and light fixture 10 of Figure 27E illustrating the fixture power connector 26 and mains power conductor 28. After attaching the main fixture housing 14 to the mounting adapter 18, the fixture power connector 26 is attached to the mains power conductor 28. Figure 27G is a bottom isometric view of the mounting adapter 18 and light fixture 10 of Figure 27F illustrating connection of the fixture power connector 26 to the mains power conductor 28. [0147] Figure 27H illustrates securing the light fixture 10 to the mounting adapter 18 of Figure 27G with fasteners 84. Figure 27I illustrates securing the mounting adapter cover 54 to the mounting adapter 18 of Figure 27H with fasteners 84. The fasteners 84 may be bolts, screws, or other mechanical means of securing these components. The fasteners 84 used for the mounting adapter cover 54 may be different (e.g., smaller and/or another type) from the fasteners 84 used to secure the light fixture 10 to the mounting adapter 18. In some embodiments, the mounting adapter cover 54 may be attached without fasteners 84, such as via snap-fit.

[0148] Figure 27J is a side view of the installed light fixture 10 of Figure 27I.

IV. Servicing of Light Fixtures

[0149] Figure 28A illustrates removal of fasteners 84 for the bottom cover of the main fixture housing 14 for servicing of the light fixture 10. Figure 28B illustrates pivoting of the light engine 20 of Figure 28A for servicing of components in the main fixture housing 14. The optical assembly 22 is pivotably attached to the main fixture housing 14 via the hinge 56 at a first end of the main fixture housing 14. The optical assembly 22 is further attached to the main fixture housing 14 at a second end opposite the first end via the fasteners 84. In particular, the bottom cover 44 of the main fixture housing 14 is affixed to the optical assembly 22 and the fasteners 84 attach the bottom cover 44 to the upper portion of the main fixture housing 14. Thus, by removing the fasteners 84, the optical assembly 22 can pivot downward to facilitate access to the power circuitry 46 and other components in the weather-sealed compartment 62.

[0150] Figure 28C illustrates the main fixture housing 14 of Figure 28B open for servicing of components without removing the light engine 20. Note that it is also not necessary to remove any fasteners 84 from the mounting adapter cover 54. In some embodiments, the optical assembly 22 can be opened without the use of tools. For example, the fasteners 84 may be tool-less fasteners 84, or the optical assembly 22 may be attached to the main fixture housing 14 without fasteners 84 (e.g., via snap-fit).

[0151] The hinge 56 can be an appropriate hinge which facilitates a weather seal when the main fixture housing 14 is closed and allows for easy service access. The hinge 56 may be a two-part hinge, with a first part attached to or formed on the main fixture housing 14 and a second part attached to or formed on the optical assembly 22.

[0152] Figure 28D illustrates removal of the light engine 20 from the main fixture housing 14 of Figure 28C. In addition to facilitating easy access to the weather-sealed compartment 62, the hinge 56 can provide for tool-less removal of the optical assembly 22 from the main fixture housing 14. For example, the hinge 56 can include one or more first hinge components 86 attached to the main fixture housing 14 and one or more second hinge components 88 attached to the light engine 20.

[0153] In particular, the first hinge component(s) 86 may be formed integral with the main fixture housing 14. A relief may be opened in at least one of the first hinge components 86 to allow for the second hinge components 88 to be decoupled from the first hinge components 86 without tools. The second hinge component(s) 88 may similarly be formed integral with the heat sink 24. The bottom cover 44 of the main fixture housing 14 is further affixed to the optical assembly 22 via attachment to the heat sink 24.

[0154] Those skilled in the art will recognize improvements and modifications to the preferred embodiments of the present disclosure. All such improvements and modifications are considered within the scope of the concepts disclosed herein and the claims that follow.