The circuit still has a switch to manually control the lights ... and implemented you’ll never stumble across a room to turn the lights out again! Perhaps mixing high and low voltages ...

Flip the switch, electricity flows. Flip it again, electricity stops. Lights on, lights off. That’s great for a small room with one entrance. Other times, we need to turn on the light ...

But a staggering one in ten motorists have admitted they don't know how to turn on their fog lights despite them being a ...

Most of the time, when a Switch refuses to turn on, it's simply out of battery ... or if you can see a faint light coming from the blank screen, it's time to force a shutdown instead.