I recently had a power cut. The local street lights went out, and all the houses were blacked out. But to my surprise, I discovered the LED light bar over my fish tank was still on. Does this mean there was still power coming through? If this is the case, could I foil a power cut by installing LED room lights?
• There may indeed have been some power still coming through, unless the fish tank light has a backup battery. Ordinary tungsten or fluorescent lamps won’t operate at a lower voltage than the usual grid supply, but an LED…
