Abstract: In one embodiment, a light source is attached to a first side of a flexible printed circuit; and the flexible printed circuit is conformed to at least part of a heat sink. A cross-section of the heat sink has surfaces facing in different directions, and conforming the flexible printed circuit to the at least part of the heat sink causes a second side of the flexible printed circuit, opposite the first side, to contact ones of the surfaces of the heat sink facing in at least two different directions. Also disclosed are various apparatus that include a heat sink, a flexible printed circuit conformed to the heat sink, and a light source attached to the flexible printed circuit.

Abstract: Light is mixed within a mixing cavity. Light is transported from the mixing cavity, through an optical cable, to a color sensor. The transported light is sampled by the color sensor. Light color within the mixing cavity is controlled based on information from the transported light sampled by the color sensor.