Patent ID: 8618735

Claim:
A light engine retrofit to retrofit an existing light fixture comprising a lid with an opening, the light engine retrofit comprising: a circuit board comprising: a plurality of light emitting diodes (LEDs) to emit light; and lighting optics to distribute the light emitted from the LEDs; and a chassis comprising: a central portion; a first side comprising a plurality of first fins extending upward from the central portion to dissipate heat in a first direction; a second side comprising: a mounting surface for the circuit board; a fin wall depending from the central portion and surrounding the mounting surface, the fin wall comprising an inner surface to prevent the light from being emitted from the chassis in a direction above a reference plane intersecting a bottom surface of the chassis; and a plurality of second fins to dissipate heat in a second direction; and an adaptor plate to mount the plurality of second fins of the chassis through the opening of the lid which has a different shape or a different size than a shape or a size of the chassis so that, when mounted, the plurality of second fins are exposed to air outside of the light fixture.