... )CE,RoHS,FCC,C-Tick,CCC,CSA 4)Base:GU5.3,GU10,E27 Epistar led 5w mr16 ... aluminium, good heat dissipation;9. Easy installation with existing socket;10. Green Product, and No strobe, no radiation, ... , to ensure safety1.2 Insert bulb into the lamp holder, rotate the bulb clockwise until bulb cap touch ... the bottom of the lamp holder. 2.Environment Requests2.1 Operating temperature:-20°C ...