The red, green, & blue LED colour changing light bulb can be used in a single static (fixed) colour or simply press the remote control to produce one of four colour changing effects. You can change your existing lamps into 'moodlamps'. The bulb is capable of emitting white, red, green, & blue, plus twelve additional bright colours. In addition to the brilliant colours you can produce with this light bulb, you have the added benefit of reducing your energy costs since the bulb only uses 3 watts of energy. Great for retrofitting into existing track lights, downlights, or lamps, they will enhance your interior spaces, create ambient or party moods at the click of a button. Fits in your standard E27 bulb socket (Not Bayonet) Controlled by a wireless remote Multiple modes: static, flash, strobe, fade & smooth Multiple colours Size (remote control): 5cm x 8cm x 0.5cm