... aluminum or shiny aluminum 3, Lamp holder PC plastic lampholder 4, Electronic ballastProduct Feature 1, Energy saving 30%~45% ... start, , no noise, low work temperature, low power consumption 4, Good for environment use solid-stated mercury, 38% less usage ... 6500KT5G521W110/220V863MM10000H2700-6500KT5G528W110/220V1163MM10000H2700-6500KT5G535W110/220V1463MM10000H2700-6500K T5 Fitting With Big Reflector