From MiniSun this is the 5 Watt dimmable SMD GU10 LED lamp comprised from a thermal plastic with a frosted lens designed to operate with a trailing edge dimmer switch (conventional leading edge dimmer switches will not operate this bulb and may damage the LED bulb). The dimming range of this model is 30%100% (light output) and provides a 4500 Kelvin Cool White light output with a 110 Degree Beam Angle.