Fluorescent lights make up a large family of light sources to choose from. They all use phosphors excited by electrons to create visible light. Typical fluorescent lamps contain a glass discharge tube and fluorescent coating on the inside, by design.
Fluorescent lamps are used in a variety of lighting applications, including outdoors and indoors, as a backlight for LCD displays, decorative lighting and business signage, as garage or warehouse lighting, for commercial buildings, and both high bay and small area general lighting. Fluorescent lights are far more energy efficient than incandescent lamps and are often used for interior lighting of homes and offices. Their low production costs and ability to diffuse light make them a popular choice for lighting projects. Keep in mind that due to the small amount of mercury in fluorescent lighting, they must be disposed of properly after use. See how to recycle them HERE.