The light was now far brighter than a single candle. Al made sure to let his fingers act as a conduit as well as a shield between his wand's handle and Severus' palm. There was a small chance of Severus being harmed by the wand but Al didn't want to take it.
He nodded, silent, and rested his free hand on Severus' shoulder. Leaned over the mutually-cast light, touched his lips to the side of Severus' face, the side of his mouth.