Chris Green presented the following explanation :
Absolutely, just about all our boat lighting is now 12v LED, just a
couple of 'old favourite' mains lamps left which are used when we have
mains power.

My caravan has 16 recessed downlighters scattered around it, plus two
240v wall lights. The 16 were 10w halogen reflector lamps, which got
quite hot. I swapped them all out with LED reflector lamps, when Aldi
or Lidl did one of their special deals on them.