Fluorescent lamps are now widely used because they have a much lower power consumption than equally bright incandescent lamps. They are available in light colors sunlight, cool white and warm white.
Fluorescent lamps Design and function
Fluorescent lamps are one of the gas discharge lamp. It consists of a glass tube, which with mercury vapor and an inert gas such as argon or krypton filled. The inside of the glass tube coated with phosphor. This converts the light generated in the operation of the ultraviolet light in a longer wavelength, ie, into visible light.

