ETL Listing refers to the certification process conducted by Electrical Testing Laboratories (ETL), a division of Intertek Testing Laboratories. As an integral part of the Nationally Recognized Testing Laboratory (NRTL) program, ETL offers comprehensive assurance, testing, inspection, and certification services across various industries, including the lighting industry.

A Volumetric troffer is a fixture specifically designed for commercial facilities, offering high-performance and optically efficient lighting solutions. It features a curved lens that fills the room with unobstructed light, ensuring even distribution and eliminating harsh glare or shadows.

Lamp efficiency measures how effectively a light source converts input power into visible light. It is expressed as the ratio between the total luminous flux emitted by a lamp and the total amount of input power it consumes.

Hertz (Hz) is a unit of frequency used to measure the number of cycles or oscillations per second in a periodic waveform.

A vintage light bulb, also known as an antique bulb, is a type of lighting fixture that replicates the look and feel of early 20th-century bulbs.

Epact, short for Energy Policy Act (EPAct), refers to a legislation enacted in 1992 with the aim of promoting energy efficiency in the lighting industry.

Emergency lighting refers to battery-backed lighting devices that are specifically designed to activate during power outages or when a lighting circuit fails.

A wake-up light, also known as a sunrise alarm clock, is a specialized lighting device used to simulate the natural sunrise and aid in waking up gradually and peacefully.

Visual comfort probability (VCP) is a term to measure the acceptability of discomfort glare in a lighting system. It is expressed as a ratio, represented as a percentage, of individuals who are likely to find the level of glare in a specific location and direction acceptable.

Cornice lighting, also known as soffit lighting, is a method of concealing the light source behind a dropped cornice from the edge of the ceiling.