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 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,possible other uses for these 12v Light Sensor Switch Modules could be for running small waterpumps for irrigation at night or fans for ventilation in greenhouses/conservatories during the day,price includes vat and uk delivery.