Standard Lighting Controls Devices including occupancy/vacancy, daylighting, or bi-level controls used as a single control strategy to adjust lighting systems to vary light level or turn on or off. Timer Device that turns lights on and off at pre-programmed times. Track Lighting Lighting system that utilizes multiple fixtures which operate off a track or strip mounted to the wall or ceiling. May be low voltage or line voltage. Trim The edge or visible part of a recessed downlight. The finishing section of the exterior of a recessed fixture. Troffer Recessed fluorescent fixture for use in a suspended ceiling; derived from the words “trough” and “coffer.” TRT vX.X Acronym for DLC’s Technical Requirements Table followed by version number. U Lamp Linear, double-ended fluorescent lamp, usually T8 or T12, bent into a “U” shape. UL Underwriters Laboratory. An independent organization whose responsibilities include rigorous testing of electrical products. Watt A unit of electrical power. GLOSSARY TERMS CONTINUED
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