A light transformer is an electrical device specifically designed to step down the voltage of an electrical power supply to a lower voltage suitable for use with lighting fixtures.

Lumen maintenance is the measurement of how well a lighting product retains its initial lumen output over time. It is a factor in evaluating the performance and longevity of light sources and luminaires.

Economic life in the context of lighting means the duration or lifespan of a lighting system or product in relation to its economic viability and profitability.

Illumination refers to the amount of light that falls on a surface per unit area. It is a measure of the brightness or intensity of the light that illuminates a given space.

In the context of the lighting, frosted lens refers to a specialized type of lens that is designed to conceal LED diodes while still allowing for effective light transmission.

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.