The flow of electrons through a wire; measured in amperes.

UL Listing for fixtures used in a moist, but an unexposed area.

Refers to the International Dark Skies Association, which campaigns against light pollution. No fixture that emits light above horizontal.

End of a piece of track that is not receiving electric power.

A light control device that spreads light by scattering it. Opal glass and plastic, etched glass, fabric, and paper act as diffusers.

Control that varies the output of the light source by reducing the voltage or current to the lamp.

Miniature rocker-style switch that mounts to the circuit boards of electronic controls.

Also known as DC. The continuous flow of electricity, as from a battery.

Lighting that casts all, or at least 90%, of the light downward.

Lighting that strikes an object or surface predominantly from a single direction. Generally used to include adjustable accent lighting using reflectorized sources.