Specifications: 1) Power: 35W 2) Lumination: 3,500lm 3) Color temperature: 3,000K, 4,300K, 5,000K, 6,000K, 8,000K, 10,000K, 12,000K, 15000K, and 25,000K 4) Life-span: 2500H (10 times longer than ordinary halogen lamps) 5) Operating ambient temperature range: -40 degree to +105 degree 6) Cover: crystal glass tube of UV-CAT anti-ultraviolet 7) Luminescence way: produced luminous by gases colliding 8)Extremely durable and vibration resistant . no filament to break. Runs much cooler than halogen and saves your precious headlights from extra strain created by heat.