Technical Field

[0001 ] The present invention relates generally to downlights, and in one form, to downlights having Light Emitting Diodes (LEDs) as their light source. More particularly the invention relates to an optic assembly for use in a downlight.

Incorporation by Reference

[0002] The following description refers to an optical assembly which is the subject of Australian provisional patent application 2012905616 by the same Applicant, entitled "LED Downlight Assembly".

[0003] This application claims convention priority from Australian provisional patent application 2012905621 by the same applicant entitled "Optic Assembly for LED Downlight".

[0004] Various aspects described herein may also be implemented in a downlight as described in PCT Patent Application No. PCT/AU201 1/082457 published as WO2001/082457 entitled "Downlight".

[0005] Also referred to in this application is Australian Patent Application No. 2012261628 entitled "LED Lamp with Current Dependent Colour Temperature" filed on 10 December 2012 to the present Applicant.

[0006] The contents of each of these applications are hereby incorporated by reference in their entirety.

Background of Invention

[0007] Downlights are lights that in use, are installed in a recess or hole in, for example, a ceiling or bulkhead, with the light source facing into the. Downlights have become very popular in recent times, and modern constructions commonly use many downlights in a given space or area. Summary of Invention

[0008] According to a first aspect, there is provided an optic assembly for use in an LED downlight, the optic assembly including: a reflector including a top and a bottom with a first aperture at the bottom of the reflector and a second aperture at the top of the reflector and a reflective surface extending at least partially between the top and bottom; and a light transmissive dome disposed at the first aperture for covering light source.

[0009] Preferably, the light source includes at least one Light Emitting Diode (LED).

[0010] In one embodiment, the reflector and the dome are two separate pieces.

[001 1 ] In one embodiment, the dome is provided as an optic piece including the dome and at least one reflector connector for connecting to the reflector.

[0012] In one form, the at least one reflector connector is a leg. The leg preferably extends from or generally from the dome. The leg may for example extend from an element located between the dome and the leg.

[0013] In one form, the optic piece includes the dome and three reflector connectors, each reflector connector being a leg extending generally from the dome.

[0014] In one embodiment, the reflector includes at least one optic piece connector for connecting to the optic piece.

[0015] In one form, the optic piece connector is a protrusion.

[0016] In one form, the reflector includes 3 optic piece connectors.

[0017] Preferably, the dome is made from Plexiglass 8N crystal clear. The reflector is preferably made from amorphous polycarbonate polymer with the reflective surface provided by an aluminium coating. [0018] Preferably, the reflective surface and a surface of the dome are

multifaceted.

[0019] According to a second aspect, there is provided a reflector for use in an LED downlight, the reflector including:

a top and a bottom;

an inner surface and an outer surface;

a reflective surface extending at least partially between the top and the bottom on the inner surface;

a first aperture at the bottom;

a second aperture at the top; and

at least one optic piece connector for connecting to an optic piece.

[0020] In one embodiment, the reflective surface is multifaceted.

[0021 ] Preferably, the reflector is made from amorphous polycarbonate polymer with the reflective surface provided by an aluminium coating.

[0022] Preferably, the at least one optic piece connector is a protrusion extending from the outer surface.

[0023] In one embodiment, the reflector includes three optic piece connectors.

[0024] According to a third aspect, there is provided an optic piece for use with an LED downlight, the optic piece including:

a light transmissive dome; and

at least one reflector connector for connecting to a reflector.

[0025] In one form, an outer surface of the dome is preferably multifaceted.

[0026] Preferably, the dome provides gradual diffusion of light to provide mixing of colours.

[0027] In one form, the optic piece includes three reflector connectors.

[0028] In one form, each of the three reflector connectors is a leg extending from or generally from the dome. [0029] In one embodiment, the leg includes a slot at the end of each leg for receiving a corresponding optic piece connector on a reflector.

[0030] According to a fourth aspect, there is provided a method of forming an optic assembly for use in an LED downlight, the method including: connecting an optic piece including a light transmissive bulb to a reflector.

[0031 ] In one embodiment, the step of connecting the optic piece to the reflector includes locating the light transmissive dome of the optic piece in an aperture at a bottom of the reflector.

[0032] In one embodiment, the step of connecting the optic piece to the reflector further includes engaging each of three notches of respective legs of the optic piece with three corresponding protrusions on a rear surface of the reflector.

Brief Description of Drawings

[0033] Embodiments of the invention will now be described, by way of example only, with reference to the following drawings in which:

[0034] Figure 1 shows an example of a space lit by a plurality of downlights;

[0035] Figure 2 is a perspective view of one embodiment of a downlight according to one aspect of the invention;

[0036] Figure 3 is a side view of the downlight of Figure 2;

[0037] Figure 4 is a bottom view of the downlight of Figure 2;

[0038] Figure 5 is a perspective exploded view of a downlight showing the various components;

[0039] Figure 6 is a side view of the components shown in Figure 5;

[0040] Figures 7A - 7C show the optic piece from various views;

[0041 ] Figures 8A - 8C show a close up of the multifaceted detail of the dome of the optic piece of Figures 7A - 7C; [0042] Figure 9A shows a front view of the reflector;

[0043] Figure 9B shows a front perspective view of the reflector, showing the multifaceted detail of the reflector;

[0044] Figure 9C shows a rear view of the reflector;

[0045] Figure 9D shows a side view of the reflector;

[0046] Figure 10A shows a rear view of the optic assembly with the optic piece connected to the reflector;

[0047] Figure 10B shows a front view of the optic assembly;

[0048] Figure 10C shows a side view of the optic assembly;

[0049] Figure 1 1 A shows a side view of the optic assembly over a light source;

[0050] Figure 1 1 B shows a front view of the arrangement of Figure 1 1 A;

[0051 ] Figure 12 shows a front perspective view of downlight housing with the light source in place;

[0052] Figure 13 shows the arrangement of Figure 12 with the optic piece over the light source;

[0053] Figure 14 shows a cross sectional view of the arrangement of Figure 12 with the optic assembly in place;

[0054] Figure 15 shows a front perspective view of the arrangement of Figure 14 showing the connection details for connecting the optic assembly to the housing;

[0055] Figure 16 shows a perspective exploded view of the components of a downlight according to another aspect;

[0056] Figure 17 shows a close up view of the light source of the arrangement of Figure 16;

[0057] Figure 18 shows the arrangement of Figure 17 with the optic piece over the light source; [0058] Figure 19A shows a side view of the arrangement of Figure 17 with the optic assembly over the light source;

[0059] Figure 19B shows a front view of the arrangement of Figure 19A;

[0060] Figure 20 shows a cross sectional view of the downlight of Figure 16 when assembled;

[0061 ] Figure 2 shows a normalised output intensity distribution plot of a downlight as shown in Figure 5 with the optic assembly 200;

[0062] Figure 22 shows a colour temperature plot across position showing relative intensity and colour temperature (K) with respect to position;

[0063] Figure 23 shows a light intensity distribution plot for the different beam angles; and

[0064] Figures 24 to 26 show the steps in forming the optic assembly. Detailed Description

[0065] Figure 1 shows a typical application of a plurality of downlights 100 installed in a ceiling 2 and extending into a ceiling space (not shown), to illuminate room space 1 . Downlights 100 when installed may be completely flush with the surface of ceiling 2 and not protrude into room space 1 , or may protrude slightly beyond the surface of the ceiling 2 into room space 1 as will be appreciated by the person skilled in the art.

[0066] While the various embodiments presented herein will be described with reference to downlights having Light Emitting Diodes (LEDs) as the light source, it will be appreciated that downlight 100 may have any suitable light source, including halogen, incandescent and/or Light Emitting Diode (LED), or a combination of one or more of these.

[0067] Figure 2 is a perspective view of downlight 100. Downlight housing 1 10 in this embodiment provides the main body of the downlight 100 and in this

embodiment, also provides a heat sink with heat sink fins 1 1 1 extending radially therefrom. It will be understood that any other suitable heat sink configurations could be used, including those described in PCT Patent Application No.

PCT/AU201 1/082457 published as WO2001/082457 entitled "Downlight" hereby incorporated by reference in its entirety.

[0068] Housing 1 10 includes a top and a bottom, the bottom of the housing for receiving a light transmission medium 130 for transmitting light generally generated inside the downlight housing 1 10 and the top of the downlight housing including a cable clamp receiving aperture (not visible in this view) for receiving a cable clamp as will be described in more detail below.

[0069] Housing 1 10 also defines a base 1 12 and a lip 1 13 at the bottom defining an opening for receiving the light transmission medium 130. In some embodiments, there is no lip 1 13 and the bottom opening is simply defined by an inner

circumference of the bottom. In some embodiments, base 1 12 is not present and in some embodiments, the heat sink extends all the way to the bottom.

[0070] The height of the downlight 100 can be any suitable height and in one embodiment, is about 60mm high. In another embodiment, the height is about 80mm. Other embodiments, range in height from about 60mm to about 80mm, including about 61 mm, 62mm, 63mm, 64mm, 65mm, 66mm, 67mm, 68mm, 69mm, 70mm, 71 mm, 72mm, 73mm, 74mm, 75mm, 76mm, 77mm, 78mm and 79mm. Other embodiments will have a height less than about 60mm, including about 40 to about 50mm, about 51 to about 55mm and about 56 to about 59mm and others have a height greater than about 80mm including about 81 mm to about 85mm, about 86 to about 90mm and about 91 mm to about 100mm and more.

[0071 ] In one embodiment as shown in Figure 2, lip 1 13 also has at least one notch 1 14 for engaging with corresponding protrusions in a collar or other fixing device for fixing the downlight 100 into a ceiling. If the corresponding protrusions of the collar do not align with the notches 1 14, then the downlight 100 will not be able to be installed. This acts to prevent a downlight of a different or non-conforming type being installed in a preinstalled collar. In this embodiment, there are shown two notches 1 14. In other embodiments, there is only one notch and in other

embodiments, there are more notches, including 3, 4, 5, 6, 7, 8, 9, 10 or more. In some embodiments, there are no notches. This feature is described in more detail in PCT/AU201 1/000022 incorporated by reference.

[0072] Transmission medium 130 may be any suitable material that at least partially transmits light, such as plastic or glass. In some embodiments, transmission medium 130 is a lens. In some embodiments, transmission medium 130 has no lensing properties.

[0073] Housed within housing 1 10 is an optic assembly 200 including optic piece 210 and reflector 220, both of which will be described in more detail below.

[0074] Also visible in this view are heat sink apertures 1 1 1 a for allowing warm air inside the housing 1 10 to flow out of the downlight 100 thereby further facilitating cooling of the downlight 100.

[0075] Figure 3 shows a side view of downlight 100 showing housing 1 10 with heat sink fins 1 1 1 , heat sink apertures 1 1 1 a, base 1 12, lip 1 13 and notch 1 14.

[0076] Figure 4 shows a bottom view of downlight 100 showing lip 1 13, notches 1 14 and optic assembly 200 including optic piece 210 and reflector 220.

[0077] Figure 5 shows an exploded view of downlight 100 showing the

components making up the downlight 100 in one embodiment. Seen in this view are reflector 220 and optic piece 210 which together form optic assembly 200. Printed Circuit Board (PCB) 170 includes circuit tracks (not shown) and has mounted thereon a light source 180, such as a Light Emitting Diode (LED) 180. In this embodiment, LED 180 is an LED chip sold under the trade name identification Luxeon M device available from Phillips Lumileds Lighting Company. It will be appreciated however that any other suitable LED can be used. In use, PCB 170 is housed within downlight housing 1 10.

[0078] Figure 6 shows the components of Figure 5 from a side view, and again shows reflector 220, optic piece 210, PCB 170 with mounted LED 180 and housing 1 10. In this view, it can be seen that reflector 220 has housing connectors 224, optic piece connectors 223 and lip 222. [0079] Optic assembly 200 will now be described in more detail. Figures 7A, 7B and 7C show optic piece 210 from various angles. In Figure 7A, there is shown optic piece 210 from a front perspective view with dome 21 1 and reflector connector 212 for connection to the reflector 220 (in this embodiment the reflector connector includes three legs 212a, 212b and 212c). Figure 7B shows optic piece 210 from the front and Figure 7C shows optic piece 210 from the side, showing like elements accordingly labelled. As can be seen in these Figures, the outer surface of dome 21 1 is multifaceted.

[0080] Optic piece 210 can be made from any suitable light transmissive material, such as glass or plastic, including acrylic or polycarbonate. In one embodiment, the material is Plexiglass 8N crystal clear. The optic piece 210 can be molded as will be understood by the person skilled in the art.

[0081 ] Figures 8A, 8B and 8C show close up views of the outer surface of dome 21 1 of the optic piece 210 from different angles. Figure 8A shows a top view of dome 21 1 showing the multiple facets 213 of the dome 21 1 . These features can be produced in the molding process as a molded feature of the outer surface. Also visible in this view are connector legs 212a, 212b and 212c.

[0082] Figure 8B shows a top perspective view showing facets 213 of dome 21 1 with legs 212a, 212b and 212c while Figure 8C shows a side view of dome 21 1 with facets 213. One leg, 212a, is also visible in this view.

[0083] Figures 9A to 9D show various views of the reflector 220. In Figure 9A, there is shown a front perspective view of the reflector 220, showing top and bottom with a first aperture 228 at the top and a second aperture 227 at the bottom. As can be seen in this view, reflector surface 221 extends at least partially from the top to the bottom. It will be appreciated that in some embodiments, reflector surface 221 will only extend part way, with a portion not being reflective.

[0084] As can also be seen in this view, reflector surface 221 is multifaceted, with multiple facets 225 clearly visible. The provision of these facets 225 contributes to the overall effect of the reflected light as will be described further below. [0085] Figure 9A also shows downlight connector reflector leg 224a for connecting the reflector 220 or optic assembly 200 (when assembled) to the downlight 100 as will be described further below.

[0086] Figure 9B shows reflector 220 from a top view with like elements labelled accordingly.

[0087] Figure 9C shows reflector 220 from a rear perspective view. In this view, the rear of the reflector 220 is visible, showing bottom aperture 227, lip 222 and downlight connectors, or reflector legs 224a, 224b and 224c. Also visible in this view are optic piece connectors 223a, 223b and 223c whose function will be described in more detail below. In this embodiment, there are also provided further protrusions 226a, 226b (not visible in this view) and 226c, to provide a further and upper retention means for respective legs 212a, 212b and 212c of optic piece 210.

[0088] Figure 9D shows reflector 220 from the side, showing reflector legs 224a, 224b and 224c, optic piece connectors 223a and 223c, and indicating apertures 227 and 228.

[0089] Reflector 220 can be molded using any suitable material such as a plastic, including amorphous polycarbonate polymer with the reflective surface provided by an aluminium coating.

[0090] Figure 10 shows a rear perspective view of optic assembly 200 in which optic piece 210 is connected to the back of reflector 220 such that dome 21 1 of optic piece 210 protrudes through bottom aperture 227 at the base of reflector 220. Optic piece 210 is secured in one embodiment, to reflector 220 via at least one optic piece connector 223 located on reflector 220. In one embodiment, optic piece connector 223 is a protrusion extending from the surface of the back of reflector 220 to engage with a corresponding slot in a respective one of the optic piece connector legs 212a, 212b and 212c (as shown in Figure 10). Of course it will be understood that any other type of suitable connection means may be employed, including permanent connection such as gluing or bonding, friction fit or other clipping arrangement. In one

embodiment, the legs 212a, 212b and 212c are replaced by concentric protruding rings, with optic piece 210 having one ring and reflector 220 having another ring, which snap together to retain optic piece 210 to reflector 220. In another embodiment, one ring is provided as a groove and the other ring as a protrusion, which then snaps into the groove of the other piece.

[0091 ] Also shown in Figure 10A are reflector lip 222 and reflector legs 224a, 224b and 224c with respective clipping portions 224a', 224b' and 224c'. These legs 224a, 224b and 224c act as a means of connecting optic assembly 200 to housing 1 10 by locating the clipping portions 224a', 224b' and 224c' into a corresponding ledge or the like in housing 1 10.

[0092] Figure 10B shows a front perspective view of optic assembly 200 showing the dome 21 1 of optic piece 210 protruding through bottom aperture 227 of reflector 220. Also seen in this view is reflector leg 224a with corresponding clipping portions 224a'.

[0093] It will be appreciated that in another embodiment, optic assembly 200 is made as a unitary piece with dome 21 1 co-moulded or otherwise formed with reflector 220. The intended reflecting surface of reflector 220 is then coated with an

appropriate reflective material. The appearance of this embodiment will be the same as that shown in Figure 10B from the front, but will appear different from the back in that there is no other part of optic piece 210 other than dome 21 1 . In yet another embodiment, reflector 220 and dome 21 1 can be formed separately and then joined together afterwards by thermal bonding, gluing or other suitable material to again provide an optic assembly that looks like that shown in Figure 10B from the front, but with no other element of optic piece 210 other than dome 21 1 .

[0094] Figure 10C shows a side view of optic assembly 200 showing optic piece 210 connected to reflector 220 via reflector connectors or optic piece legs 223a, 223b and 223c (not visible in this view) via optic piece connectors or reflector protrusions 223a, 223b and 223c (not visible in this view) as previously described with reference to Figure 10A.

[0095] Figure 1 1 A shows a side view of optic assembly 200 with dome 21 1 (not visible in this view) generally covering light source 180 mounted to PCB 170.

[0096] Figure 1 1 B shows a front perspective view of the arrangement of Figure 1 1A in which light source 180 can be seen covered by dome 21 1 . Dome 21 1 in one aspect, provides mechanical protection to LED 180, including from knocks and also from dust and other particles.

[0097] Figure 12 shows an example of PCB 170 with mounted light source or LED 180 secured to housing floor 1 15 of the housing 1 10 of downlight 100. In one embodiment, PCB 170 is connected to housing 1 10 by posts 1 16 that extend from the floor 1 15 and through respective apertures 171 formed in the PSB 170, but it will be appreciated that any other suitable means can be used.

[0098] Figure 13 shows optic piece 210 in place over PCB 170 and light source 180. As can be seen the light source 180 is an LED which is covered by dome 21 1 . Legs 212a, 212b and 212c rest against an inside wall of housing 1 10. Figure 13 simply illustrates the location of optic piece 210 with respect to LED 180.

[0099] In one embodiment, optic assembly 200 can be produced by securing reflector 220 over optic piece 210 already located in housing 1 10. In another embodiment, optic assembly 200 is first formed by connecting optic piece 210 to reflector 220 as shown in Figure 14. Optic assembly 200 is then secured to housing 1 10 over LED 180. Housing apertures 140 are provided to allow securing of optic assembly 200 as will be described in more detail below with reference to Figure 15.

[0100] Figure 14 shows optic assembly 200 located in housing 1 10 over LED 180. In one embodiment, optic piece legs 212a, 212b and 212c are sandwiched between the rear surface of reflector 220 and the inside wall of housing 1 10. This results in an inward pressure of optic piece legs 212a, 212b and 212c towards reflector 220, thereby providing a tight connection between reflector 220 and optic piece 210 by securely maintaining the connection between protrusions 223 of reflector 220 and the notches of legs 212a, 212b and 212c of optic piece 210 as previously described.

[0101 ] Figure 15 shows another front perspective view of downlight 100. This view shows how downlight connectors or reflector legs 224a, 224b and 224c engage with the downlight housing 1 10. In this view, reflector 220 is shown as transparent so as to allow viewing of how downlight connectors or reflector legs 224a, 224b and 224c connect with the downlight housing 1 10. In this view, reflector leg 224c and corresponding clipping portions 224c' can be seen engaging in respective downlight housing apertures 140 to retain and secure reflector 220 and optical assembly 200 to downlight 100. In this view parts of the clipping portions 224c' and 224b' of respective legs 224c and 224b are visible from the outside, engaged with and protruding from corresponding housing apertures 140.

[0102] To release reflector 220 and optic assembly 200 from downlight 100, inward pressure is applied to the clipping portions 224a', 224b' and 224c' to release them from engagement with the sides of housing apertures 140 and allow optic assembly 200 to be removed.

[0103] Figure 16 shows a similar arrangement as Figure 5, but with a different downlight 100 and in particular, a different light source arrangement. In this

embodiment, there is shown housing 1 10 with heat sink fins 1 1 1 , optic assembly 200 with reflector 220 and optic piece 210, light source 180 mounted to PCB 170, control PCB 190 supporting control circuitry and electrical connector 195 for connecting to a cable connected to an electrical power source. End plug 300 incorporates electrical connector 195 which allows direct access by the power cable to the connector 195.

[0104] When assembled, control circuitry on control PCB 195 is connected to the circuitry on PCB 170 by any suitable means, including with wires that connect the two PCBs through one or more aperture formed 1 17 in the floor 1 15 of the housing 1 10.

[0105] In the embodiment as shown in Figures 16, 17 and 18, light source 180 is provided by multiple LEDs (in this example, three LEDs 180, 180', 180" and three LEDs 181 , 181 ', 181 "). Any suitable LEDs can be used. In this example, LEDs 180, 180' and 180" are LEDs sold under the brand identification Luxeon Rebel ES-1 , while LEDs 181 , 181 ', 181 " are LEDs sold under the brand identification Luxeon -Z-lnGaN- white-1 . In this example, there is also a further, central LED 182, which in this example is an LED sold under the brand identification Luxeon-Z-AllnGaP-1 . All of these LEDS are provided by provided by Phillips Lumileds Lighting Company. Other suitable LEDs include other chip on board devices provided by suppliers such as Cree, Inc. (for example LED product sold under the identifier name of Xlamp XM-L2) and Sharp Electronics Corp. (for example LED products sold under the identifier name of Zenigata).

[0106] Figure 17 shows a close up view of PCB 170 with LEDs 180, 180', 180" 181 , 181 ', 181 " and 182. [0107] Figure 18 shows the same view as Figure 17 but with optic piece 210 laid over the LEDs 180, 180', 180", 181 , 181 ', 181" and 182 to show how the LEDs are covered by dome 21 1 , thus providing mechanical protection for them.

[0108] Figure 19A shows a side view of optic assembly 200 over the PCB 170 and LEDs of Figures 17 and 18. In this embodiment, optic assembly 200 is provided by the connection of reflector 220 to optic piece 210 as previously described. The optic assembly 200 is then laid over the LEDs in the housing 1 10 of the downlight 100 as previously described.

[0109] Figure 19B is a front view of the arrangement of Figure 19A with like elements accordingly labelled.

[01 10] Figure 20 shows a cross sectional view of the assembled downlight 100 of Figure 16 showing optic assembly 200 in place in downlight 100 over LEDs 180, 180' and connected to housing 1 10 as previously described.

[01 1 1 ] As previously described, the bulb 21 1 of optic piece 210 covers and provides mechanical protection to the light source 180 (i.e. the LED or LEDs 180) under the dome 21 1 . This protection can prevent or reduce damage to the light source 180 from knocks for example received during installation, and also from dust and other foreign particles. The dome 21 1 also serves to blend light from multiple distinct sources where there is more than one LED in use.

[01 12] In another aspect, where multiple colour LEDs are used (for example as in the arrangement shown in Figures16 and 17), the dome 21 1 serves to mix the colours. In particular, the dome's optics, provided by a multi-faceted surface and gradual diffusion allows for optimal colour mixing in a small height from the LED surface to the top of the dome 21 1 . This mixing result is shown in the distribution graphs shown in Figures 21 and 22 referred to below, and shows nearly perfect colour mixing from multiple sources over the entire beam angle. This is normally achieved by utilisation of a mixing chamber, which will be either straight edged or cone section, of highly polished white plastic with a diffuser mounted at an adequate height to achieve the mixing. The exited light would be then coupled to a reflector, making the entire height unworkable in a form-factor required for the present application of a downlight as described herein. [01 13] This may be enhanced by a method of controlling colour mixing as described in Australian Patent Application No. 2012261628 entitled "LED Lamp with Current Dependent Colour Temperature", previously incorporated by reference.

[01 14] The optics provided by optic assembly 200 also serves to simulate current Halogen lights.

[01 15] Figure 21 shows a normalised output intensity distribution plot of a downlight 100 as shown in Figure 5 with the optic assembly 200. The plot shows a comparison of the output intensity of the downlight compared with a standard Halogen lamp and a 60 degree target line. In this arrangement, the total input is 760 Lumens, has a reflectivity of 90% (provided for example using a high quality aluminium finish) and using Plexiglass 8N crystal clear as the material for the optic piece 210.

[01 16] The total output is 643.7 lumens, with efficiency of 84.7% and for a beam angle of 60.7 degrees.

[01 17] In the case of multi-coloured light sources such as in the arrangement of Figures 16 and 17, in which the dome 21 1 assists to mix the colours, Figure 22 shows a colour temperature plot across position showing relative intensity and colour temperature (K) with respect to position. Figure 23 shows a light intensity distribution plot for the different beam angles.

[01 18] In another aspect, there is also provided a method of forming an optic assembly for use in an LED downlight. This method includes the step of connecting an optic piece including a light transmissive bulb to a reflector as shown in step 500 of Figure 24. This step is also illustrated and described above with reference to Figure 10A for example.

[01 19] Figure 25 shows the step 510 of connecting the optic piece to the reflector by locating the light transmissive dome of the optic piece in an aperture at a bottom of the reflector.

[0120] Figure 26 shows the step 520 of connecting the optic piece to the reflector by engaging each of three notches of respective legs of the optic piece with three corresponding protrusions on a rear surface of the reflector. [0121 ] While the various aspects of the present invention have been described with reference to specific embodiments, it will be understood that these are for illustrative purposes and not to be regarded as limiting the scope of the invention to those embodiments.

[0122] The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement of any form of suggestion that such prior art forms part of the common general knowledge.