Lighting system with particular sealing arrangement
Exemplary lighting systems, light fixtures, and wireways that can be used in a variety of public transportation or architectural applications are described. The light engines can be edge lit and sealed. The light engine includes an internal flange that engages a portion of the light diffuser assembly to force the light diffuser assembly against a seal to allow the light engine to be assembled with fasteners disposed at the top of the light engine. The wireways can include a common routing compartment disposed above a plurality of wiring channels.
1. A light engine comprising:
first and second sidewalls; each of the sidewalls having an upper inwardly-disposed projection and a lower inwardly-disposed projection;
a diffuser assembly having an upper surface and a lower surface; the diffuser assembly disposed above the lower inwardly-disposed projections;
a top plate connected to the upper inwardly-disposed projections of the first and second sidewalls;
a pair of flanges extending from the top plate; each of the flanges extending from the top plate to a location disposed under one of the upper inwardly disposed projections;
each of the flanges engaging the diffuser assembly; and
wherein each of the flanges resiliently engages the diffuser assembly to impart a force that holds the diffuser assembly against the lower inwardly-disposed projections.
2. The light engine of claim 1 , further comprising a seal disposed between the diffuser assembly and each lower inwardly-disposed projection.
3. The light engine of claim 2 , further comprising a seal disposed between the top plate and each upper inwardly-disposed projection.
4. The light engine of claim 3 , wherein each seal disposed between the top plate and the upper inwardly-disposed projection is disposed between fasteners connecting the top plate to the upper inwardly-disposed projection and the connection of the flange to the top plate.
5. The light engine of claim 1 , further comprising LEDs disposed to edge light the diffuser assembly.
6. The light engine of claim 1 , wherein each sidewall includes an upwardly projecting abutment wall; the top plate being disposed between the abutment walls.
7. The light engine of claim 1 , wherein each upper inwardly-disposed projection defines a fastener channel; the top plate being connected to the sidewalls with plurality of fasteners disposed in the fastener channels.
8. The light engine of claim 7 , wherein each flange has a portion disposed between one of the fastener channels and one of the lower inwardly-disposed projections.
9. The light engine of claim 1 , wherein the diffuser assembly includes a light guide plate.
10. The light engine of claim 9 , wherein the diffuser assembly includes a reflector disposed on the light guide plate.
11. The light engine of claim 10 , wherein the diffuser assembly includes a cover that engages the lower inwardly-disposed projections.
12. The light engine of claim 1 , further comprising first and second end caps that sealingly engage the sidewalls, top plate, and diffuser assembly.
13. A light engine comprising:
first and second sidewalls; each of the sidewalls having an upper inwardly-disposed projection and a lower inwardly-disposed projection;
a diffuser assembly having an upper surface and a lower surface; the diffuser assembly disposed above the lower inwardly-disposed projections;
a top plate connected to the upper inwardly-disposed projections of the first and second sidewalls with a plurality of top plate fasteners;
a seal disposed between the top plate and each upper inwardly-disposed projection; the top plate fasteners compressing each seal between the top plate and the upper inwardly-disposed projections;
a pair of flanges extending from the top plate; each of the flanges extending from the top plate to a location disposed under one of the upper inwardly disposed projections;
each of the flanges resiliently engaging the diffuser assembly to impart a force that holds the diffuser assembly against the lower inwardly-disposed projections; and
a seal disposed between the diffuser assembly and each lower inwardly-disposed projection.
14. The light engine of claim 13 , further comprising LEDs disposed to edge light the diffuser assembly.
15. The light engine of claim 13 , wherein each sidewall includes an upwardly projecting abutment wall; the top plate being disposed between the abutment walls.
16. The light engine of claim 13 , wherein each upper inwardly-disposed projection defines a fastener channel; the top plate fasteners being disposed in the fastener channels.
17. The light engine of claim 16 , wherein each flange has a portion disposed between one of the fastener channels and one of the lower inwardly-disposed projections.
18. The light engine of claim 13 , wherein the diffuser assembly includes a light guide plate.
19. The light engine of claim 18 , wherein the diffuser assembly includes a reflector disposed on the light guide plate.