Gu10 spot light specification: 7.Color:pure white/warm white/cool white 8.Color temperature (optional):2900~6500k 9.Housing material:aluminum 10.Working lifetime:50000hours 11.Product size:50*45.5mm 12.Available base:e27/gu10/mr16 Features: 1)80~90% energy saving than incandescent lights 2)no uv, no rf radiation, no flickering 3)low energy consumption 4)no mercury or hazardous materials and environment-friendly 5)guarantee: 2 years 6)double reflector unique elegant designt 7)working environmen is -20~40degree celsius, body temp. 8)led life span: 50, 000 hours Applications: Suitable for general lighting, especially for museums, art galleries, cosmetic counters, and more. Carton