It's weird but I never have a vampire running out during daylight. At least not in Forgotten Hollow. Did not try to play in the other hoods yet. But the only vampire who has sun protection is Caleb and he may run outside or come as welcome wagon! But other usually appear around midnight and much later! BTW. sun protection for Caleb is broken, I suppose because of the MC Command Control mod. I just do not want to play without it. But in order to keep him from burning, I may have to delete it until it gets an update.