Light pattern with sharply defined boundary, like that produced by a framing projector.

The metal part that conducts heat away from LED, sensitive dimmer or fixture components to maintain cool operation.

A small area of higher illumination than the surrounding surface, typically produced by locating a light source too close to the surface or by the improper optical design of a fixture.

Lighting that directs all or most light upward for ambient or general illumination.

Recessed downlight suitable for direct burial in thermal insulation, called Type IC.

Infrared-Reflecting Halogen lamp using a special interior coating redirects infrared energy onto the filament, which increases output without added power.

The enclosure that protects spliced wires and supports surface fixtures.

A scientific unit of temperature.