20W Redo Tube Light is offered by our company to our customers which is very energy efficiency and has long service life. This tube light is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. This tube light has short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow.20W Redo Tube Lightis a kind of light that uses a combination of electricity and mercury vapour to create light energy. This tube light is very cost effective and has fast installation as well as simple operation too. This can be easily purchased by our clients at cheaper prices, in bulk quantities.