... 4.Good light transmittance Certification: ISO 9001, ISO14001, OHSAS18001This Lighting quartz pipe has the typical characteristics of hiht purity, ... speed streamline production. And further prcessing of trim cutting, fire polishing, bending and pinching can be done according to ... 4 Application: This large diameter quartz is widely used in halogen lamps, mercury lamps, single-ended lamp, automobile lamp, ...