So here is the question, if you have a character A who is in an area of non-magical darkness without darkvision, and Enemy B in an area of light with darkvision, can character A see Enemy B to attack him? I ask because think of a dark room with a single spotlight shining on someone, even though I don't have darkvision I could easily shoot them irl but I'm not sure of the rules here. Thanks in advance!
As long as your perception is good enough to see them that far away and you have direct line of sight to him you can.