HP Mercury lamps (HQ/HPLN)-need to use additional ballast and high in luminous efficiency,long in using life.Suitable for indoor and outdoor lighting. ------Glass Option: White coated ------Shape Option: E.ED.BT Tubular,Reflector. TYPE: HM50 / HM80 / HM125 / HM175 / HM250 / HM400 /HM1000