... : -40 ~ 50 centigrade7.Life span: >50,000 h8.Full range of colors: cool white, white, warm white, blue, green, ... radiationFetures and Advantage:1.Directly replace general halogen light2.long life:50000hrs,25 times than the normal energy saving ... the expect lumens,without swift loss.5.Low lumen attenuation: High quality constant current driver and good heat dissipation techniques3.Caption1) ...