Elrigs LED SceneSwitch Light Bulb, 3 Color in 1 Bulb, 3 Step Dimming, GU10, 5/5/1.5 Watt(40 Watt Equivalent), 120 Volt, 500/500/150-Lumen, 6000/3000/2700-Kelvin, Pack of 4 -DIMMING without DIMMER: With a ordinary switch change the bulb from 100% brightness in cool white(6000K) to 100% brightness in warm white(3000K) to 30% brightness in warm grow(2700K), are not compatible with dimmers, 3-way lamp -MEMORY FUNCTION: the intelligent memory chip will memorise your last setting if the switch is turned off for longer than 5 seconds -RESET FUNCTION: simply restore all the bulbs to the default setting when more bulbs are used and they are no longer synchronised, turns on and off the switch 7 times -EYE CARE: flicker free technology, protect your vision when you reading -2 YEARS WARRANTY: Elrigs offer two years unlimited warranty, just contact us for any question or replacement