Doped with Ce and other microelements , this quartz glass tube can stop all radiation from UV-B and UV-C, and most of the radiation from UV-A. It is an ideal material with maximum light  trasmittance  which  is used to produce quartz halogen lamps, gas discharge lamps and other UV light. This glass can effectively prevent ultraviolet radiation from hurting people and objects, and can maintain visible light to its maximum efficiency of transmission.