I'm under instructions to find and test all the Xmas lights while Mrs B is at work today.
In the olden days, this would be a hell of a palaver. Plug in lights - nothing. Find non working bulb and replace - still nothing - find further non working bulb - search through Xmas tat box for further replacement - find scores of bulbs each with a different fitting. Still nothing. - test fuse in plug - nothing - start working through the bulb holders to see if one is faulty. At this point the string of lights inexplicably light up. Dry connection.
Bugger it. That will do. Remember last year was also ' put lights on tree then fiddle about with them until they work'. Remember to tell Mrs B to always switch them off if going out.
These days it's just pull several strings of led out of the crimbo tat box. And of course they just work. That is one Xmas tradition that I'm happy to leave behind.