Ah, that's not the intended solution to Oiler. I had alot of people in playtesting get the wrong idea aswell, so you're not alone (did you try to use the second vine?) Also, having vines getting stuck is sort of the design space I'm in. that's how you make the puzzles. I appreciate you playing through to the end. I've not had any problems w putting the lightbulbs in walls. I wonder if that's a framerate issue.
I think that in future dev I'd want to make it so the lightbulbs are only on while you're holding them, so that you could pause to read signs.