Delivered lumens are the actual amount of useful light that is emitted and reaches a specific area or scene. It takes into account factors such as reflection, refraction, and absorption that can cause some of the light to be lost or redirected within the lighting fixture.

Color Rendering Index (CRI) is a measurement to assess how accurately a light source can reproduce the colors of objects. It is represented on a numerical scale ranging from 0 to 100, with higher values indicating better color rendering capabilities.

Far red light, also known as FR light, is a waveband at the extreme end of the visible light spectrum, with wavelengths between 700 and 780 nanometers (nm).

A pulse start ballast is a type of ballast specifically for pulse start metal halide lamps. Unlike traditional probe start ballasts, pulse start ballasts do not rely on a starting probe electrode.

Instant Start (IS) is a starting method used for fluorescent lamps. It involves the use of electronic ballasts that apply a high voltage directly to the lamp’s electrodes without preheating the cathode.

A wafer light, also known as a canless light, is a type of lighting fixture which is characterized by its ultra-thin design, making it ideal for recessed lighting applications.

Soft light is a type of illumination that produces shadows with a gradual transition from light to dark. It is characterized by the absence of visible harsh shadow lines on the subject or object being illuminated.

A boob light is a specific type of flush mount dome light fixture. These fixtures typically feature a glass or plastic dome that is secured by a central metal screw or finial.

High bay is a specific type of lighting fixture designed for illuminating large areas with high ceilings, typically ranging from 20 to 40 feet in height from the floor.

A house-side shield is a device or component specifically designed to address the issue of unwanted light spillage onto private property behind a streetlight.