Kemo M122 12V Light sensor switch Module or twilight switch,for turning loads of up to 3amps (36 watts) on at night and off during the day,these Light sensor switch Modules are ideal for powering a 12v light in driveways or gardens overnight and turning it off at Dawn,they can an also be used in reverse if required,ie to turn a 12v appliance up to 36watts on during the day and off again at night,Please note these Light sensor switch Modules will only work with a 12v dc voltage such as provided by a car battery,price includes vat and uk delivery.