Base up describes a specific orientation or direction of a lighting fixture. It refers to the positioning of the base of the fixture in an upward direction.

A Compact Fluorescent Lamp (CFL) is a type of energy-efficient light bulb. It is designed as a more environmentally friendly alternative to traditional incandescent bulbs.

A discharge lamp is a type of artificial light source commonly used in the lighting industry. It operates by transmitting an electrical discharge through ionized gaseous substances.

Heat lightning refers to a weather phenomenon where distant lightning flashes are visible without any accompanying thunder. It is often observed on warm summer nights and is caused by lightning produced by thunderstorms that are located far away from the observer.

Light distribution refers to the pattern in which light is emitted and spread out from a lighting fixture or source. It describes how the light is dispersed across a specific area or space, determining the directionality, intensity, and coverage of the light.

A can light, also known as a recessed light or downlight, is a type of lighting fixture that is installed into an opening in a ceiling.

A magnetic ballast, also known as a choke, is an electrical power regulator used specifically in fluorescent light systems. It operates based on the principles of electromagnetism, where an electrical current passing through a wire generates a magnetic force around itself.

Monochromatic light is electromagnetic radiation that consists of a single wavelength or a very narrow range of wavelengths. This means that monochromatic light is composed of only one color or hue.

A lamp refers to both a light source and a light fixture that includes the bulb. This can cause confusion as the term is often used interchangeably with other lighting terms.

A discharge bulb, also known as an electric discharge lamp or gas-discharge lamp, is a type of lighting device used in high-intensity discharge (HID) lighting systems.