A C9 bulb is a type of light bulb, particularly during the Christmas season. It is characterized by its larger size compared to other Christmas light bulbs, such as C6 and C7 bulbs.

Medium light is a level of illumination that is not direct but still provides sufficient brightness for plant growth. It is the amount of light that plants receive when they are positioned at a moderate distance from a window, where they are not exposed to direct sunlight.

VSC light is the Vehicle Stability Control light. VSC, which stands for Vehicle Stability Control, is a system utilized by Toyota and Lexus to manage traction control.

A baffle is a device or component used to control the distribution of light and reduce glare. It is commonly used in various lighting fixtures such as recessed downlights, track lights, and pendant lights.

Blue light is a specific range of wavelengths within the visible light spectrum, typically ranging from approximately 380 to 500 nanometers.

UL Listing is a certification mark provided by Underwriters Laboratories (UL), an independent organization that tests and certifies products for safety and performance.

Room utilization factor is the percentage of actual light that reaches the surface of a room. It is a measure of how effectively the lighting system illuminates the intended area.

A ballast is a small device or control gear that is typically found inside a light fixture which supplies the necessary voltage to start the light and regulate the amount of current flowing to the light.

Preheat, in the context of the lighting industry, refers to the practice of applying a minimal amount of electricity to the filament or fixture of a lamp before fully powering it on.

An enclosed light fixture, also referred to as an enclosed luminaire, is a type of lighting fixture that features a sealed internal cavity where the light bulb or light source is housed.