Ok, I should ask for guidance from on high.
Prestidigitation. One of its effects is that you can "instantaneously light or snuff out a candle, a torch, or a small campfire."
I'm used to the houserule that it's a "fire the size of" on of those, and not those three things specifically. (Always struck me as odd you can light a candle but not a lamp, and if you move that same campfire into a fireplace you can't light it or put it out.) But I wanted GM approval before I start doing things that don't technically follow the rules.