Redtag Lighting&reg; Dimmable 3W MR16 LED Bulb, 35W Equivalent, Recessed Lighting, Track Lighting, Warm White Dimmable Works with most of dimmers but to ensure flicker free dimming, please use with silicon-controlled rectifier(SRC) type dimmer Replace 35W halogen bulb by 4W LED. Save over 85% energy cost Standard MR16 shape, which can replace MR16 halogen bulb directly