I've got NPCs traveling with the party, and I'm handing them out to players to run for me. One of these NPCs has darkvision. It is assigned to a player whose PC does not have darkvision. Because the same player controls both characters, both characters are benefiting from the light output from the character with darkvision. I'm >this< close to removing the NPC's darkvision because this is a pain in the rump. Any suggestions?