... ballast inside Features:*Tricolor light source by ISUN T8 fluorescent tubes, color rendering index above 80%, service ... alloy, durable, corrosion resistant;*ISUN electronic ballast inside;*Lamp holder rotating sheath structure, using VO retardant plastic ( ... PC) manufacturer, fire-retardant performance, and security in line with national standards; Applications:*Home, hotels, shopping malls, offices, ...