Staying power

One of my correspondents tried to switch on his hall light the other day. He wanted to put the milk bottles out. Nothing. He had to find a torch.
    When he got round to changing the bulb the next morning, he as amazed to find that it was a 60 Watt incandescent bulb of the sort banned by the EU back in about 2009.
    This bulb had obviously been installed before then and it has kept going for at least 15 years. Not something you can expect from the more modern alternatives on offer at a fancy price.