... material Alu + crystal ,some in material of Iron + crystal 3:Color of crystals: White, Light tea,Yellow , Light blue,Green, Colorfully for choice 4 ... : suitable power for bulb: G4 : ... 3W,MR16,MR11,etc 5:Color temperature for LED : 6000-6500K -white , 2700-3500K- warm white, or Red/Green/Blue,etc 6: ...