Light engine

A light engine comprising:

• a. a heat sink;
• b. a printed circuit board comprising at front face and a rear face, wherein the printed circuit board is mounted on the heat sink such that the rear face of the printed circuit board faces the heat sink;
• c. a plurality of light emitting diodes mounted on the printed circuit board to emit light from the front face of the printed circuit board;
• and
• d. an optical assembly positioned on the heat sink, wherein the optical assembly comprises an. optic retainer having a plurality of reflector receivers and a plurality of reflectors, each reflector positioned within one of the plurality of reflector receivers, wherein the optical assembly is positioned on the heat sink so that each of the plurality of reflectors surrounds at least one of the plurality of light emitting diodes.

A method of modifying the light distribution of a light engine from a first distribution to a second distribution, the method comprising:

• a. providing a light engine comprising:
• i. a heat sink;
• ii. printed circuit board comprising al front face and a rear face, wherein the printed circuit board is mounted on the heat sink such that the rear face of the printed circuit board faces the heat sink;
• iii. a plurality of light emitting diodes mounted on the printed circuit board to emit light from the front face of the printed circuit board;
• and
• iv. an optical assembly positioned on the heat sink, wherein the optical assembly comprises (a) an optic retainer having a plurality of reflector receivers, (b) a plurality of initial reflectors, each initial reflector having optical properties and positioned within one of the plurality of reflector receivers, and (c) at least one initial lens having optical properties and positioned over the plurality of reflectors, wherein the optical assembly is positioned on the heat sink so that each of the plurality of reflectors surrounds at least one of the plurality of light emitting diodes;
• b. removing the at least one initial lens from the optical assembly;
• and
• c. positioning at least one replacement lens over the plurality of reflectors, wherein the at least one replacement lens has optical properties different from the optical properties of the at least one initial lens.

A lighting system comprising

• a. light engine comprising:
• i. a heat sink,
• ii. a first pin extending from a first side of the heat sink and a second pin extending from a second side of the heat sink opposite the first side;
• iii. a printed circuit board comprising at front face and a rear face, wherein the printed circuit board is mounted on the heat sink such that the rear face of the printed circuit board faces the heat sink;
• iv. a plurality of light emitting diodes mounted on the printed circuit board to emit light from the front face of the printed circuit board;
• and
• v. an optical assembly comprising at least one reflector, wherein the optical assembly is positioned on the heat sink so that the at least one reflector at least partially surrounds at least one of the plurality of light emitting diodes;
• b. a mounting frame having a mounting frame opening;
• and
• c. a first upright support extending upwardly from the mounting frame on a first side of the mounting frame opening and a second upright support extending upwardly from the mounting frame on a second side of the mounting frame opening opposite the first side, wherein the first and second upright supports each comprises an elongated slot,
• wherein the light engine is adapted to be positioned over the mounting frame opening so that light from the plurality of light emitting diodes is emitted through the mounting frame opening, wherein the first pin engages the elongated slot of the first upright support and the second pin engages the elongated slot of the second upright support, and wherein the first and second pins are configured to translate within the elongated slots to move the light engine from a first position over the mounting frame opening to a second position removed from the mounting frame opening.