Extended Description Low energy bulb with eddison screw base (E27) with built in Dusk to Dawn Sensor that turns the light on (at dusk) and off (at dawn) automatically ! Saves 80% more electricity than standard bulbs with the same light output. This bulb is a 15w which have a light output equivilent to a 75w traditional bulb. This quality bulb has a lift of 8000 hours, standard bulbs have a life of 1000 hours - Change bulbs less often. IDEAL FOR SECURITY APPLICATIONS. CE & RoHS Compliant. Price £8.99