... light transmittance Certification: ISO 9001, ISO14001, OHSAS18001This heat-resistant glass tube has the typical characteristics of hiht purity, good ... lamps, metal halide lamps and other quartz lamps. This glass can be supplied in the range of 3-80mm outside ... diameter quartz is widely used in halogen lamps, mercury lamps, single-ended lamp, automobile lamp, stage lamp, thermocouple, copiers lights, ...