This workshop runs on one small flame, and the flame is failing. Wick has been burning on the last of his wax, alone, for a long time. He's frightened. He needs you before he needs anything else. Don't let him go out.
He's running on fumes. There's a fresh block of beeswax on the bench. Drag it into his reservoir and his flame will catch hold of it, steady, and grow. You'll feel the panic go out of him. Do this first; everything else waits until he's safe.
Strong again, Wick wants to do the thing he's for. Carry his flame to each cold candle on the shelf. One by one they catch, and the whole workshop comes up out of the dark into honey-gold light. He couldn't do this until you saved him. Now he can't wait to.
Everything here is made of the same wax that brought Wick back.