The Danlers selection of Ceiling Photocell Switches, designed as an energy saving solution for use in schools, offices, factories, sports halls and the like. In this range are flush mounted switches and surface mounted suitable for plasterboard and solid ceilings respectively. These switches turn lights off when there is sufficient ambient light but require the wall switch to be operated in order to switch on. In this way the lights only switch on when they are demanded.
A built in time delay of 1 minute avoids unnecessary switching.