Hello!
It is indicated that it is not compatible with the mod "https://mods.factorio.com/mod/AfraidOfTheDark", but what is the incompatibility, can you be a little more specific?
Is this a critical incompatibility, or does it have some minor impact?

I get what you mean. I'm not sure, to be honest.

I took it over from the original mod maker, and he had it listed as an incompatibility. I never tested it myself, and I'm not planning to release extra updates. It works... ish.

Given what I've heard and seen about the original creator he probably listed it as an incompatibility simply because he thought it was silly to install a lamp mod alongside a mod designed to make night time a "non-issue". That's pure speculation on my part, though, so take that with a grain of salt.

Edit

Just changed the mod locally to test, works completely fine. So there's zero technical reason for this to be listed as incompatible.

Removed the incompatibility check.