guess that could be cool, as long as it's a leveled spell since it's better than Light. And not always useful compared to Darkvision (rooms without possible light sources etc) so it doesn't content with that.
Question, should it be able to surprise our opponents? I mean, I would get guite freaked out if all the candles/torches around me suddenly burst into flame.
I was more thinking of a once per short rest wand or out of combat ritual as to not add any gameplay elements other than to be able to search the room after a fight. Considering you can only cast "light" on one source at a time which is odd to me as it isn't a concentration spell like dancing lights. Normally I just cast firebolt on the torches but it gets tedious.
Light and dancing lights can be cast in combat situations where this spell could not.
EDIT: Thinking about it maybe you could have a "light multiple sources" option on fire bolt ot auto target them as you would in the tabletop?
