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Title:
LIGHTING ARRANGEMENT COMPRISING REPLACEABLE LIGHT ENGINE
Document Type and Number:
WIPO Patent Application WO/2021/233883
Kind Code:
A1
Abstract:
A lighting arrangement (100) comprising a light engine (110) and a structure (150) is provided. The light engine comprises at least one light source (115) comprising a LED (111) and a lens (113), wherein the lens is arranged on a carrier (120). Further, the carrier is connected to a printed circuit board (130), and a first fastening element (140) is attached to the printed circuit board. The first fastening element comprises at least one first clip portion (141). The structure comprises a second fastening element (160), and the second fastening element comprises at least one second clip portion (161). The light engine is releasably connectable to the structure via a mating engagement of the at least one first clip portion of the first fastening element and the at least one second clip portion of the at least one second fastening element.

Inventors:
LEROUX, Guillaume, Georges, Olivier (5656 AE Eindhoven, NL)
Application Number:
PCT/EP2021/063089
Publication Date:
November 25, 2021
Filing Date:
May 18, 2021
Export Citation:
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Assignee:
SIGNIFY HOLDING B.V. (5656 AE Eindhoven, NL)
International Classes:
F21V5/00; F21V19/00; F21V23/06; F21Y105/16
Attorney, Agent or Firm:
PET, Robert, Jacob et al. (High Tech Campus 7, 5656 AE Eindhoven, NL)
Download PDF:
Claims:
CLAIMS:

1. A lighting arrangement (100), comprising:

- a light engine (110), comprising

* at least one light source (115) comprising a LED (111) and a lens

(113),

* a carrier (120) arranged to support the at least one lens,

* a printed circuit board (130) arranged to support the at least one LED and connected to the carrier, and

* a first fastening element (140) attached to the printed circuit board, wherein the first fastening element comprises at least one first clip portion (141), and

- a structure (150) comprising a second fastening element (160), wherein the second fastening element comprises at least one second clip portion (161), wherein the first fastening element and the second fastening element comprises metal and the light engine is releasably mechanically and electrically connectable to the structure via mating engagement of the at least one first clip portion of the first fastening element and the at least one second clip portion of the second fastening element.

2. The lighting arrangement according to claim 1, wherein the at least one second clip portion, upon engagement with the at least one first clip portion, is biased, thereby exerting a pulling force between the light engine and the structure.

3. The lighting arrangement according to claim 2, wherein at least one of the at least one first clip portion and the at least one second clip portion is shaped such that the magnitude of the pulling force exerted between the light engine and the structure is adjustable.

4. The lighting arrangement according to claim 1, 2 or 3, wherein the first fastening element is provided with a curved portion configured to be elastically deformed by a fastening means.

5. The lighting arrangement according to any preceding claim, wherein the at least one first clip portion is shaped as a flange and the at least one second clip portion is U- shaped.

6. The lighting arrangement according to claim 5, wherein the printed circuit board extends along a first plane, Pi, and the structure extends along a second plane, P2, wherein the at least one first clip portion extends in parallel to the first plane, Pi, and the at least one second clip portion extends in parallel to the second plane, P2, such that the light engine is releasably connectable to the structure via a sliding motion parallel to the first plane, Pi, and the second plane, P2.

7. The lighting arrangement according to claim 5 or 6, wherein the length of the at least one second clip portion is in the range of 5 - 15 mm and more preferably 8 - 12 mm.

8. The lighting arrangement according to any preceding claim, wherein the first fastening element is positioned in a center portion (135) on the printed circuit board.

9. The lighting arrangement according to any preceding claim, wherein the structure constitutes a heat sink, preferably made of metal, for example aluminum.

10. The lighting arrangement according to any one of claims 1-8, wherein the structure constitutes a luminaire.

11. The lighting arrangement according to any preceding claim, wherein the structure extends along a second plane, P2, and comprises at least one side wall (155) extending perpendicular from the second plane, P2, wherein the at least one side wall extends toward the printed circuit board when the light engine and structure are connected, such that the at least one side wall at least partially encloses the first and second fastening elements.

12. The lighting arrangement according to any preceding claim, wherein the structure is a die cast metal body or a plastic fixation body.

13. The lighting arrangement according to any preceding claim, wherein the light engine is rectangular.

14. The lighting arrangement according to any preceding claim, wherein the first fastening element is fixed to the light engine, and the second fastening element is fixed to the structure by at least one fastening means (170, 171).

Description:
Lighting arrangement comprising replaceable light engine

FIELD OF THE INVENTION

The present invention generally relates to lighting arrangements, and in particular, lighting arrangements comprising light engines.

BACKGROUND OF THE INVENTION

The area of illumination has seen a rapid development with the introduction of new technologies, such as light emitting diodes, LEDs, and connected smart lighting solutions. The area is under continuous transformation and continues to attract attention. Compared to traditional light sources such as incandescent lamps, fluorescent lamps, neon tube lamps, etc., arrangements or devices comprising LEDs provide numerous advantages such as an increased flexibility and control, a more compact design, and/or a reduced power consumption. In particular, traditional light sources are rapidly being replaced by LED-based lighting solutions.

Despite the numerous advantages of the illumination arrangements or devices describe above, these may nevertheless be associated with shortcomings related to component maintenance, repair and/or replacement. One specific area in need of improvement is the handling of defect components or units. For example, when a light source is defect, the replacement process often requires the entire lighting arrangement to be returned to a workshop for maintenance. This procedure may be cumbersome, expensive and/or environmentally unsustainable. It should be noted that today, there is no standardized connection for LEDs, as is the case with traditional lightbulbs. This may further exacerbate the maintenance, repair and/or replacement of defect components or units of lighting arrangements.

Hence, it is an object of the present invention to provide improved lighting arrangements in order to mitigate these shortcomings and to increase the usability of the lighting arrangements, in particular by facilitating any maintenance and/or repair of the lighting arrangements. SUMMARY OF THE INVENTION

In the light of the above, it is of interest to provide alternative lighting arrangements in order to improve their usability, in particular by facilitating any maintenance and/or repair of the lighting arrangements. These and other objects are achieved by providing a lighting arrangement having the features in the independent claims. Preferred embodiments are defined in the dependent claims.

Hence, according to a first aspect of the present invention, there is provided a lighting arrangement comprising a light engine. The light engine, in its turn, comprises at least one light source, comprising a light emitting diode, LED, and a lens. The light engine further comprises a carrier arranged to support the lens(es) of the at least one light source, a printed circuit board, arranged to support the at least one LED and to be connected to the carrier, and a first fastening element comprising metal is attached to the printed circuit board, wherein the first fastening element comprises at least one first clip portion. The lighting arrangement further comprises a structure comprising a second fastening element which comprises metal. The second fastening element, in its turn, comprises at least one second clip portion, wherein the light engine is releasably mechanically and electrically connectable to the structure via mating engagement of the at least one first clip portion of the first fastening element and the at least one second clip portion of the second fastening element. Typically the first and/or the second fastening element are made of resilient material, for example spring steel.

It will be appreciated that the lighting arrangement hereby may be assembled such that the light engine is releasably connected to the structure. The mating engagement of the first clip portion(s) and the second clip portion(s) achieves a construction of the lighting arrangement which promotes an easy and convenient release of the light engine from the structure, and analogously, a connection of the light engine to the structure. The release and connection may, for example, be performed through a sliding motion of the light engine with respect to the structure. The construction makes the lighting arrangement easy to assemble and to disassemble, respectively, whilst the releasable connection also efficiently secures the light engine to the structure. It will be appreciated that this lighting arrangement achieves a simple and reliable solution for the removal of a light engine from a structure, such as a luminaire. The lighting arrangement further provides the advantage of being an inexpensive and easy-to-use solution for the replacement of components and/or units of the lighting arrangement, such as defect light sources. For example, there may be no need for removal of the structure from the lighting arrangement in case of maintenance or repair of the light engine. Furthermore, as components and/or units of the light engine (e.g. one or more light sources) may be exchanged at its location of use, no specific maintenance, tools or skill set may be required.

It will be appreciated that the lighting arrangement of the present invention further comprises relatively few components. The relatively low number of components is advantageous in that the lighting arrangement is relatively inexpensive to fabricate. The relative simplicity of the configuration of the lighting arrangement, and specifically the first and second fastening elements, renders a (cost) efficient production of the lighting arrangement. Thus, the convenient design of the first and second fastening elements may benefit the proprietor of the lighting arrangement as well as the producer thereof. The ingenious construction of the lighting arrangement makes it reliable and easy to manage, thus further enhancing its usability.

It will be appreciated that the lighting arrangement of the present invention may be suitable for use in a number of areas due to the versatile configuration of the fastening elements. The fastening elements, comprising at least one first clip portion and at least one second clip portion, may be relatively small in size. Thus, the present invention may be utilized in areas where a relatively large size or bulkiness of a light arrangement is undesirable. Further, in case the lighting arrangement is arranged in a hanging or standing position, the lighting arrangement may be supported by the fastening clips. Thus, the lighting arrangement may be beneficial in substantially any area for illumination purposes.

The lighting arrangement of the present invention is further advantageous in that it comprises one or more LEDs as its light source. It will be appreciated that the LED lighting arrangement further enhances the sustainability, compactness and suitability for different areas of use. This may further prove beneficial as the LED lighting arrangement may provide a longer operational life, a reduced power consumption, and an increased efficiency related to the ratio between light energy and heat energy.

According to an embodiment of the present invention, there is provided a lighting arrangement wherein the at least one second clip portion, upon engagement with the at least one first clip portion, is biased. This meaning, there is a pulling force exerted between the light engine and the structure. In other words, the at least one first and second clip portions are arranged such that, when in a connected configuration, the second clip portion(s) exert(s) a pulling force between the light engine and the structure such that the light engine and the structure may be held rigidly together. It will be appreciated that the lighting arrangement is configurated in a compact manner where the different parts or components of the lighting arrangement are held closely together. This does not only make the lighting arrangement compatible in areas where a small size thereof is desirable but may also prove aesthetically pleasing and thus encourage further areas of use where, for example, a decorative effect is desirable. Furthermore, the present embodiment is beneficial as the light engine and the structure being held together in a relatively strong and rigid manner achieves an even more stable and durable lighting arrangement.

According to an embodiment of the present invention, at least one of the at least one first clip portion and the at least one second clip portion is shaped such that the magnitude of the pulling force exerted between the light engine and the structure is adjustable. This meaning, the shape, form and/or configuration of the first clip portion(s) and/or the second clip portion(s) may be chosen to achieve a specific pulling force which is to be exerted between the light engine and the structure. The pulling force may be chosen to achieve a desirable position, or distance, between the light engine and the structure. Further, the first clip portion(s) and/or the second clip portion(s) may be arranged or shaped such that the pulling force exerted may be adjustable, for example, thereto the first fastening element may be provided with a curved portion configured to be elastically deformed by a fastening means. The present embodiment is advantageous in that the selectable and/or adjustable pulling force and/or distance between the light engine and the structure may be chosen in order to achieve one or more desired effects related to the releasable connectivity between the light engine and the structure.

According to an embodiment of the present invention, the at least one first clip portion of the lighting arrangement is shaped as a flange and the at least one second clip portion is U-shaped. By the term “flange” it is here meant a flat, sheet like structure, which may be essentially rectangular and/or may be at least partly bent. The present configuration of the at least one first and second clip portions may facilitate the mating engagement between the clip portions. Furthermore, the configuration of the at least one first and second clip portions may secure the light engine and structure efficiently together, whilst decreasing the need of a certain skill set to operate the releasable connection. It will be appreciated that the configuration of the first and second clip portions makes the light engine and structure easy to release from each other. Correspondingly, upon engagement of the light engine and the structure, the first and second clip portions provide a secure connection between the two. Further, the relative simplicity of the at least one first and second clip portion makes production, setup and/or maintenance cost and resource efficient. According to an embodiment of the present invention, the printed circuit board of the lighting arrangement extends along a first plane, Pi, and the structure extends along a second plane, P2. The at least one first clip portion extends in parallel to the first plane, Pi, and the at least one second clip portion extends in parallel to the second plane, P2. This meaning, the light engine is (becomes) releasably connectable to the structure via a sliding motion parallel to the first plane, Pi, and the second plane, P2. The present embodiment is advantageous in that the at least first and second clip portions are arranged such that the mating engagement may comprise a sliding motion of the light engine with respect to the structure, resulting in a simple, yet effective, engagement procedure. By providing the light engine and the structure with connections releasable through a sliding motion in parallel to the first and second planes, the risk of malfunctioning and unintentional loss of contact whilst retaining efficiency may be decreased.

According to an embodiment of the present invention, there is provided a lighting arrangement wherein the length of the at least one second clip portion is in the range of 5 - 15 mm and more preferably 8 - 12 mm. In other words, the light engine and structure may be releasably connected through a sliding motion which is, at least approximately, of the length of the second clip portion. This embodiment is advantageous in that it decreases the risk of accidental disconnection of the light engine from the structure.

According to an embodiment of the present invention, the first fastening element is positioned in a center portion on the printed circuit board. The positioning of the first fastening element is advantageous as the fastening element may not be visible for an observer of the lighting arrangement. The present embodiment is advantageous in that the lighting arrangement may become even more aesthetically pleasing. Furthermore, the present embodiment may increase suitable usage areas of the lighting arrangement. Furthermore, the centered position of the first fastening element may keep the at least one first clip portion less prone to outside damage and/or tampering. This may in turn make the lighting arrangement more durable.

According to the present invention, the first fastening element and the second fastening element of the lighting arrangement comprises metal. A configuration of this kind may be suitable due to one or more advantageous properties of metallic materials, such as light weight and durability. Thus an electrical connection may be achieved. Thereto the first fastening element comprises a first and a second clip portion, each comprising a respective conductive portion which are mutually electrically isolated and each electrically connects a respective conductive track on the PCB with a respective electrical contact of an electrical power source to form a closed electrical circuit. Alternatively, the first fastening element comprises a single clip portion, said single clip portion then comprising two, mutually isolated portions that are (to be) electrically connected to respective electrical contacts on the PCB and to respective electrical contacts of a power source. This is advantageous in that there may not be any need for a separate electrical connection between the light engine and the structure, thus diminishing the need of further components. Consequently, this further enhances usability, compactness and reliability of the lighting arrangement.

According to an embodiment of the present invention, the structure of the lighting arrangement constitutes a heat sink which may preferably be made of metal, for example aluminum. The present embodiment is advantageous in that the light engine of the lighting arrangement may efficiently diffuse heat during operation via the heat sink. More specifically, the first and second fastening elements may ensure a close and/or rigid connection between the light engine and the heat sink, thereby improving the thermal management of the light engine. Furthermore, according to the above-described advantages of the lighting arrangement, the light engine may be efficiently and easily connected, and disconnected, respectively, to the heat sink.

According to an embodiment of the present invention, the structure of the lighting arrangement constitutes a luminaire. The present embodiment is advantageous in that the light engine may be efficiently and easily connected, and disconnected, respectively, to the luminaire.

According to an embodiment of the present invention, the structure extends along a second plane, P 2. The structure comprises at least one side wall which is extending perpendicular from the second plane, P 2. Further, the at least one side wall extends toward the printed circuit board when the light engine and structure are connected, such that the at least one side wall at least partially encloses the first and second fastening element. In other words, the side wall(s) of the present embodiment of the lighting arrangement may at least partly surround the first and second fastening elements, making the elements not visible from outside of the lighting arrangement. This embodiment is advantageous in that the enclosed fastening elements may increase the durability of the lighting arrangement. The sidewalls may further increase the compactness of the lighting arrangement as the fastening elements may be at least partly enclosed by the structure.

According to an embodiment of the present invention, the structure of the lighting arrangement is a die cast metal body or a plastic fixation body. This meaning, the structure, onto which the light engine is releasably connectable, may be produced in a cost- efficient and reliable manner. The production of a structure according to the present embodiment may be accomplished with a relatively small number of components, further improving the efficiency of the lighting arrangement.

According to an embodiment of the present invention, there is provided a lighting arrangement which comprises a light engine that is rectangular. In other words, the light engine may for example be a shaped as a square, or an elongated rectangle.

According to an embodiment of the present invention, the first fastening element of the lighting arrangement is fixed to the light engine, and the second fastening element is fixed to the structure by at least one fastening means. For example, the fastening means may comprise at least one screw or at least one rivet. The present embodiment is advantageous as the dynamics of the lighting arrangement is increased with the simplicity of the attachment of the fastening elements to the light engine and the structure, respectively. This may further enhance flexibility of the lighting arrangement, as the first and second fastening elements may be conveniently disconnected and, if necessary, replaced. This may increase the life-length of the lighting arrangement, being both environmentally and economically sustainable.

According to an embodiment of the present invention, the printed circuit board of the lighting arrangement further comprises a mechanical interface and an electrical interface for mechanical and electrical connection, respectively, to the structure when the light engine and structure are connected. The present embodiment is advantageous as the mechanical interface of the printed circuit board provides a stable mechanical connection to the structure. Furthermore, the electrical interface of the printed circuit board provides an electrical connection to the structure such that no separate electrical connection is required for the lighting arrangement. This would inherently simplify the production as well as the usage of the lighting arrangement, thereby decreasing the risk of malfunctioning.

BRIEF DESCRIPTION OF THE DRAWINGS

The above, as well as additional objects, features and advantages of the present invention, will be better understood through the following illustrative and non limiting detailed description of embodiments of the present invention. Reference will be made to the appended drawings, on which:

Figs la and lb schematically show a view of a lighting arrangement according to an exemplifying embodiment of the present invention, Fig. 2 schematically shows a light engine of the lighting arrangement according to an exemplifying embodiment of the present invention,

Fig. 3 schematically shows a structure of the lighting arrangement according to an exemplifying embodiment of the present invention,

Fig. 4 schematically shows a side-view of a lighting arrangement according to an exemplifying embodiment of the present invention, and

Fig. 5 shows a slight modification of Figure 4.

All the figures are schematic, generally not to scale, and generally only show parts which are necessary in order to elucidate the invention, whereas other parts may be omitted or merely suggested.

DETAILED DESCRIPTION

Figures la and lb show schematic views of a lighting arrangement 100 according to an exemplifying embodiment of the present invention. The lighting arrangement 100 comprises a light engine 110. The light engine 110 is extending along a plane Pi, and is releasably connected to a structure 150. The structure 150 is in turn extending along a parallel plane P2.

Figure la displays the light engine 110 arranged onto the structure 150 when the lighting arrangement 100 is in a disconnected position. The arrow A depicted in Figure la visualizes the intended movement of the light engine 110 along plane Pi relative the structure 150 and plane P2. This mating arrangement connects the two separated parts of the lighting arrangement 100.

Figure lb shows the two parts, i.e. the light engine 110 and the structure 150, in a releasably connected configuration. For example, the state of the lighting arrangement 100 in Figure lb may be obtained after the mating engagement described in reference to Figure la, has been performed. This meaning, sliding the light engine 110 in parallel to the first plane, Pi, and the second plane, P2 in the opposite direction than described in Figure la, will release the light engine 110 from its connection to the structure 150. As depicted, the releasably connected light engine 100 and structure 150 are held rigidly together by the ingenious configuration of the fastening elements of the lighting arrangement 100, described further in Figures 2, 3 and 4.

Figure 2 shows an exploded schematic view of a light engine 110 of a lighting arrangement according to the present invention. As seen in the exploded view, the exemplified light engine 110 comprises a plurality of light sources 115. Each light source 115 comprises a LED 111 and a lens 113. The LEDs may be direct emitting LEDs which provide a color. The LEDs may for example be RGB, UV or blue LEDs. Further combinations of LEDs and other light sources may be used. Other embodiments may comprise any combination of suitable types and number of light sources 115. The lenses 113 of the light sources 115 are arranged on a carrier 120. The carrier 120 may be a substrate which may be flexible or rigid. The carrier 120 may for example comprise a silicone material or any other suitable material. The carrier 120 is in turn arranged to a printed circuit board, PCB, 130, which also supports the at least one LED 111. As depicted in the figure, a first fastening element 140 is attached under the PCB 130. The first fastening element 140 is depicted as being positioned in a center portion 135 on the PCB 130. Other positionings of the first fastening element 140 on the PCB 130 may be utilized. The placement may for example be chosen to hide the first fastening element 140 from being detected, increase aesthetic appearance of the lighting arrangement and/or be chosen to improve the rigidity of the arrangement. In the embodiment depicted, the first fastening element 140 comprises two first clip portions 141, 142, but it should be noted that the fastening element may comprise any other suitable number of first clip portions 141, 142. The first fastening element 140 comprises clip portions 141, 142 made of a metallic material, for example made of a galvanized steel plate. The first clip portions 141, 142 in this embodiment are shaped as flanges, which are slightly bent and are mutually electrically isolated. Each clip potion electrically connects a respective conductive track on the PCB with a respective fastening element 160, 161 which are mutually electrically isolated (see Fig. 3) and form an electrical contact of an electrical power source to form a closed electrical circuit (not shown). Other embodiments may however utilize first clip portions 141, 142 of slightly different configurations. The parts of the light engine 110, as discussed above, are in this case held together using fastening means 170, depicted as plastic or metallic rivets. Other embodiments may however utilize screws or similarly suitable fastening means 170.

Figure 3 shows an exploded schematic view of a structure 150 of a lighting arrangement according to the present invention. The structure 150 in Figure 3 depicts a luminaire, but it should be noted that the structure 150 may in other embodiments comprise a heat sink or any other structure suitable for a light engine to be attached thereto. The second fastening element 160 is attached to the structure 150 with fastening means 171, herein depicted as a screw. Other embodiments may however utilize other suitable fastening means 171. The second fastening element 160 comprises, in this depiction, two second clip portions, 161, 162. Other embodiments may utilize any other suitable number of second clip portions 161, 162. A suitable number of second clip portions 161, 162 may for example be a number corresponding to the number of first clip portions of the first fastening element of the light engine. Depicted in the present embodiment are second clip portions 161, 162 of U-shaped configurations, making them suitable for receiving the first fastening elements of the light engine. Variants of the shape of the second clip portions 161, 162 may be utilized such that a mating arrangement with the first clip portions may be achieved. The second clip portions 161, 162 are, in the embodiment depicted in Figure 3, intended to be of 10 mm length. However, alternative arrangements may utilize other suitable dimensions, for example a length of the second clip portions 161, 162 in the range of 5 - 15 mm or more often preferably 8 - 12 mm. In the present Figure, the structure 150 comprises side walls 155 at least partly surrounding the second clip portions 161, 162. The side walls 155 may be of various height, width and may surround the second clip portions 161, 162 in any way desirable. The side walls 155 in the present embodiment are arranged such that when the structure 150 is releasably connected to the light engine, the first and second clip portions 161, 162 are not visible from outside the lighting arrangement 100.

Figure 4 shows a schematic side-view of a lighting arrangement 100 according to an exemplifying embodiment of the present invention. The depicted embodiment shows a light engine in a releasably connected mating engagement of a first clip portion 141 and a second clip portion 161. The lighting arrangement 100 comprises light sources 115 arranged on a carrier 120. In the depicted embodiment the carrier 120 is arranged on the upper side of a printed circuit board, PCB, 130. On the opposite side of the PCB 130, a fastening element 140 is located. The fastening element 140 may for example comprise a galvanized steel plate. The first fastening element 140 is attached to the PCB 130, and the carrier 120, by a fastening means 170 exemplified as a plastic rivet. However, alternative arrangements utilizing, for example, screws is plausible. As shown in the present embodiment, the first fastening element 140 is arranged with one first clip portion 141, but any other suitable amount of first clip portions is possible. The first clip portion 141 is arranged as a flange and is of the same material as the rest of the first fastening element 140. It should be noted, however, that alternative configurations may be utilized. The light engine 110 is connected to a second fastening element 160 which, in turn, may be connected to a structure (not shown) such as a luminaire or heat sink which may preferably be made of metal, for example aluminum. The second fastening element 160 comprises a second clip portion 161. The second clip portion 161 has a U-shaped configuration, suitable for a mating engagement with the first clip portion 141. The releasable connection constitutes a mating engagement, here depicted as a sliding motion, parallel to the first plane, Pi, and the second plane, P2, as shown with arrows A and B. The second clip portion 161 is biased in the engagement with the at least one first clip portion 141. This meaning, the second clip portion 161 is exerting a pulling force on the first clip portion 141. The configuration of the first clip portion 141 and second clip portion 161 are such that the light engine 110 and the structure may be held rigidly together. It should be noted that the first clip element 140, the first clip portion 141, the second clip element 160 and/or the second clip portion 161 may be shaped such that the magnitude of the pulling force exerted between the light engine 110 and the structure is adjustable.

As shown in Figure 5, the difference with the embodiment shown in Figure 4 is that the first fastening element 140 is provided with a curved portion 143 which in combination with the amount of compression by the fastening means 170 determines the position of the first clip portion 141 with respect to the PCB 130 and second clip portion 161 and hence the pulling force. Thereto, in the figure, the curved portion 143 comprises an undulated shape with edges 145 of the undulated shape resting on the PCB 130 and with fastening means 170 extending through the PCB and the center 147 of the undulated shape. Yet, the curved portion may also be absent in the first clip element, for example as shown in Figure 4.

The person skilled in the art realizes that the present invention by no means is limited to the preferred embodiments described above. On the contrary, many modifications and variations are possible within the scope of the appended claims. For example, one or more of the components of the lighting arrangement, such as the first and second fastening elements, the at least one first and second clip portions, the light engine, the light sources and the structure may have different shapes, dimensions and/or sizes than those depicted/described.