The combination of Druidcraft and Control Flame would cover Light then, no homebrew needed. You make a stick burst into cold greenish flame with 2 quick cantrips.Hmm. I am leaning towards #2 then. You both seem to like it well enough, even if the effect isn't as eerie or cool.
Actually, now that I look at it, Druidcraft already covers it:
You instantly light or snuff out a candle, a torch, or a small campfire.
As I was thinking a torch or small campfire size light.