Light trespass, also known as spill light, is the unintentional or excessive illumination that spills over from one property or lighting system and negatively affects an adjacent property or space.

A HID lamp, short for High-Intensity Discharge lamp, is a type of gas discharge lamp which operates by creating an electric arc between two electrodes within an ionized gas.

A custom rebate is an incentive program offered by local utility companies in the lighting industry. It is specifically designed to encourage and reward projects that involve unique equipment or process changes aimed at reducing energy consumption and demand.

A vanity light is a type of fixture that is commonly used in bathrooms. It is installed above the sink area, either on top of the mirror or on the sides.

A circuit breaker is an electrical device that protects electrical circuits from overloads and short circuits. It functions as a switch that can open and close an electrical circuit, ensuring the safe and efficient operation of lighting systems.

Color uniformity is the consistent and even distribution of color across a lighting system. It is a measure of how well the emitted light maintains a consistent color appearance throughout its coverage area.

Veiling luminance, also known as disability glare, is the reduction in visibility caused by scattered light. It refers to the additional brightness or glare that is perceived by the eye due to stray light bouncing around within the eye itself.

A PAR38 bulb is a type of light bulb. The term “PAR” stands for “parabolic aluminized reflector,” which refers to the shape and design of the bulb.

In the lighting industry, double ended refers to a type of gas-filled tubular lamp that has connectors on both ends, allowing it to snap into place on a fixture.