TRIAC DIMMABLE-Dim smoothly from 10% - 100%,1000lm per LED track luminaire,2700K warm white energy efficient 10W LED track light equivalent to 60w halogen ,dimmable with most Led dimmers(Tip* Not fully compatiable with all dimmer, Please check your dimmer model in technical details if you’re using traditional NON-LED dimmers).Compatible with H type 3-wire-1 circuit track system and Halo light circuit(Track Rail and Dimmer are NOT included in the package). REPLACEABLE GU10 BULB- H ltrack light head come with 10watt 2700K (warm white) GU10 LED bulb daylight CRI90 (60W Halogen Light Equiv.)Gu10 track light head made with120V GU10 base twist and turn typed Track Lighting Fixture.Please check the type of your track before ordering it, this Halo track light head will not fit with Juno or Lightolier track.Max LED bulb length (measure from bulb face to end of the pin is 2.17 inch;dimeter: 1.97 inch .) Track Lighting Head accepts screw in base lamps in different sizes and wattage.Include 10W GU10 Daylight 2700K Led Bulb ,can spotlight Ceiling Downlight Specifications: Wattage: 10 watts Rotated: 270° Input voltage: 110-160V Luminous Flux(Lm): 1000lm Average Lifetime(Hour): 50000 Replace Halogen Lamp: 60Watts > Colour temperature(K): 2700K( Day light ) Package: 10W Black Track lighting Head X 10 Features: Long lifespan, Instant start, no flashing High strength aluminum body makes it solid and durable, shockproof Save power more than 80% by ordinary bulbs Long time working, 12 hours/day is perfect, produce low heat, No RF Interference