... 220V-415V Wave length :0.76~25um Gold or white coated quartz tube is used for new type quartz tube ... mof tube and consequently infrared depreciation during lifetime.3. Coated to reduce visible glare ,improving color rendering and raising ... large halls ,warehouses, storage areas ,garages,terraces,greenhouse, open air applications,stadiums,camp sites ,painting drying ,etc Gold coated and white Coated ...