... 6000 hoursOur Main Products:Quartz Glass Products: quartz tubes, quartz plates, and quartz glass apparatus; Heating Lamps: halogen heating lamps, carbon heating lamps, and infrared heating lamps; Halogen Tungsten Lamps: iodine ... -tungsten lamps, as well as MR11, MR16, E27, E14, GU10, JCDR, JDR, PAR2, ... infrared halogen ...