... :Aviation aluminumLife span:50000hoursApplication:Replacement bulbs for traditional halogen lampes, especially for museums, art galleries, cosmetic,counters ... Features:1.Aluminum body, ceramic base, electroplate chrome for surface.2.Ambient temperature:-200C -- 400C3.Color temperature ... .High lumen output,310lm for white,equivalent to 40w incandescent6.Use ceramic socket for better insulation and heat ...