Connection system for a luminaire, and a lighting system using the connection system

1. A linear lighting system comprising:

a set of at least two luminaires and a connection system coupling respective ends of housings of adjacent luminaires;

wherein each luminaire comprising:

a housing having an open front and a back, at least one end of the housing comprising:

an end face;

a tapered pillar projecting from the back, the tapered pillar having a top opening,

wherein the connection system comprises a coupling arrangement for coupling respective ends of the housings of two luminaires together butted against each other, the coupling arrangement comprising:

a bridge having a first and second tapered openings, each for fitting over a respective tapered pillar of one of the two adjacent housing ends; and

a sprung retaining clip projecting within each of the first and second tapered opening, for passing though the top opening of the respective tapered pillar and for gripping the pillar beneath the top opening.

2. A linear lighting system as claimed in claim 1 , wherein each pillar has a rectangular shape and all sides of the rectangular shape taper.

3. A linear lighting system as claimed in claim 1 , wherein the top opening of each pillar comprises an elongate slot, with its long axis parallel to the end face.

4. A linear lighting system as claimed in claim 3 , wherein each sprung retaining clip comprises a limb having a shaft and a barb at the end of the shaft, wherein a width of the shaft is parallel to the long axis of the elongate slot.

5. A linear lighting system as claimed in claim 4 , wherein the barb of the limb comprises a cam lower surface for engaging with the slot during attachment of the coupling arrangement and a retaining upper surface for engaging with the underside of the slot after attachment of the coupling arrangement.

6. A linear lighting system as claimed in claim 5 , wherein the retaining upper surface is for engaging with the underside of a top surface of the pillar in which the top opening is formed.

7. A linear lighting system as claimed in claim 1 , wherein the sprung retaining clip is adapted to deform away from the end face during attachment of the coupling arrangement and spring back after attachment of the coupling arrangement.

8. A linear lighting system as claimed in claim 1 , wherein a top of the bridge comprises a top wall with openings enabling access to the sprung retaining clips.

9. A linear lighting system as claimed in claim 1 , wherein the coupling arrangement is a push fit over two tapered pillars without external fixings.

10. A linear lighting system as claimed in claim 1 ,

wherein the dimensions of the tapered pillar and the top opening are arranged to enable connection of the housings of two luminaires together using the connection system.

11. A linear lighting system as claimed in claim 10 , wherein the tapered pillar is positioned in the middle, in the housing width direction, of the back of the housing.

12. A linear lighting system as claimed in claim 10 , wherein the end of the housing comprises a plurality of pillars projecting from the back, across the width of the housing.

13. A linear lighting system as claimed in claim 10 , wherein the end of the housing further comprises a respective pillar projecting from the back at each side of the housing.

14. A linear lighting system as claimed in claim 10 , further comprising one or more of:

a light transmissive cover for covering an opening of the housing;

one or more lighting units within each housing; and

a lighting driver mounted outside the housing.