With such low-power LED lights available, I've been setting up some of my lighting to simply be on all the time, 24x7, e.g. 1 of 6 downlights or 1 out of 4 LED "tube"s in a troffer. Usually I just establish the convention of leaving the switch on. However I'd like to re-task those switches to other purposes, and simply hardwire the light into always-hot.
What does the National Electrical Code say about that? Does it require a switch so the light can be turned off easily by people in the room? Does it suffice that there's a circuit breaker in the panel? Does the light need to be marked with which breaker operates it? Is there a serious user-interface/usability issue with lights that can't be turned off? Is there anything I'm missing?