LED light engine apparatus

A method for providing a light engine retrofit to retrofit an existing light fixture comprising a lid with an opening, the method comprising:

• providing 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
• providing a chassis comprising:
• a central portion;
• a first side comprising a plurality of first fins extending toward the interior 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.

A light engine retrofit to retrofit an existing light fixture comprising a lid with an opening, the light engine retrofit comprising:

• 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 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.