Out here along the southern Spanish Med coast and in Ibiza, I have noticed that fewer than 20% of boats have an anchor light when at anchor (as opposed to being on a mooring buoy). Several people of different nationalities have said that it is no longer the custom to show a light when anchored in an anchorage. That's news to me but in any case I consider it to be a dangerous practice.
Quite aside from the obvious risk of being hit by another vessel, who would be deemed responsible if someone hit a boat at anchor, that was not showing the correct lights?
I rather suspect that if you don't carry the correct lights - i.e. the designated power and visibility - then you might be liable for all the costs should another vessel hit you. Would your insurer pay out if it was shown (which it would be) that you were lying to anchor without the correct lights?
Something to bear in mind when substituting LED arrays and other means of lighting in preference to whatever the boat builder installed.
Have others come across this attitude? Most people in the UK and Channel seem to be quite good about lighting-up at anchor, or is that changing too? Plenty of yachts cross the Channel with nav lights off until they see another boat (duh!!) but at least they seem to burn an oil lamp at anchor, if nothing else.