... Dimmable LED, dimmable electronic ballast, dimmer system, high power LED street light , flood light , LED high bay , etc Dimmmable CFL Types: Spiral , ... 10%-100% smooth linear dimming range by IC technology•85% energy saving , 8 times as incandescent bulb•8,000-10000 hours ... CE ROHS Standard Half Spiral 230V 20W Warm White 2700K E27/B22 Dimmable Energy Saving Lamp With Ordinary TRIAC dimmer switch