Patent ID: 8764216

Claim:
A light-emitting diode (LED) system to retrofit a light fixture comprising: a frame to be installed under a light fixture installed in a ceiling suspension system, the frame having a perimeter and a light seal surface arranged around the perimeter; and a LED lighting assembly detachably couplable to the frame such that at least a portion of the LED lighting assembly is received by the light seal surface of the frame, the LED lighting assembly comprising: an optical waveguide having co-planar surfaces and an edge separating the co-planar surfaces; a plurality of LEDs arranged to inject light into the edge of the optical waveguide where the light is dispersed out of at least one of the co-planar surfaces; a heat spreader, the heat spreader comprising: a channel to house the edge of the optical waveguide and at least a portion of the LEDs via a thermal interface; and a plate extending distal to the channel covering a portion of the co-planar surface opposite the at least one co-planar surface of the optical waveguide to dissipate heat from the LEDs housed in the channel, the plate having one or more dimples forceably in contact with the portion of the co-planar surface opposite the at least one co-planar surface of the optical waveguide.