quartz tube ,like normal clear tube, translucent tube, ozone free tube, UV block tube with low-OH. quartz tube Power: H shape: 5w,7w,9w,11w,13w,18w,24w,36w,55w Tubular shape: 4w,6w,8w,10w,15w,20w,30w,40wMaterial :Quartz material, ozone, non-ozone quartz tube