In the context of lighting, nominal watts is the power rating of lamps as specified by the manufacturers. It represents the maximum power output that a lamp is designed to provide.

A lensed troffer is a specific type of lighting fixture designed for installation in drop ceiling systems. It is characterized by its inclusion of a lens or cover that serves to distribute and control the output of light.

A cutoff fixture is a lighting fixture that is specifically designed to minimize light pollution, glare, and light trespass with a specific light distribution pattern.

Group relamp is a maintenance strategy employed in the lighting industry where all lamps within a specific group or area are replaced simultaneously, rather than individually as they fail.

A Low-pressure sodium (LPS) lamp, also known as a Sodium oxide (SOX) lamp, is a type of lighting fixture which operates by passing an electric current through a mixture of sodium vapor and a noble gas, such as neon or argon, at low pressures and temperatures.

In the lighting industry, a canopy refers to a specific type of lighting fixture designed for exterior spaces located under an overhang.

Semi flush refers to a type of lighting fixture that is mounted to the ceiling with a small gap between the base of the fixture and the ceiling.

Photopic lumens are the measurement of light output that takes into account the sensitivity of the human eye under intense lighting conditions.

Dichroic is a type of filter or thin-film interference filter used to manipulate the color of light. These filters are designed to selectively pass light of a specific range of colors while reflecting other colors.

A Mogul Base, also known as an E39 base, is a type of lamp base used in the lighting industry for larger-sized bulbs.