Ordinary timers can’t cope with the electrical charge required to switch HID lamps on. Ordinary timers are at risk of fusing making the timer fail – so your lights will remain on or off, damaging your plants. Green Power contactors protect against this damage by controlling the switching through the contactor instead of directly through a small timer. Green Power relays and contactors are built in the UK. Key Features: Heavy duty build with internal wiring Switchable sockets World renowned professional Grasslin timer Built in the UK to strict C.E. standards Rubberised HO7RNF cable resistant to light ray degradation (not applicable to commercial units) Robust metal housing 2 year manufacturer's warranty Green Power lighting control units are designed to control your HID lighting and maintain a safer grow room. They absorb the electrical power surges which occur every time your HID lights turn on, so that these surges never reach your timer. 'Did you know?' Huge power surges which occur when HID lighting is switched on can cause the timer elements to fuse together becoming damaged and potentially hazardous. Using a Green Power lighting control unit prevents this damage from occurring.