[@mattmanganon]
It depends on far more factors than that. For example, Buffy vampires are only harmed by sunlight because of it's supposedly mystical properties, and recreating sunlight through artificial means doesn't bother them. In addition, the Original Dracula displayed the capability to move around in sunlight, although it weakened him. And then there are Hellsing vampires, who just don't give a shit in general. And R+V vampires, some of whom have the sheer durability to tank a nuclear attack to the face, and are completely unharmed by sunlight. The sheer quantity of different types of vampires makes it impossible to make one statement that describes any significant portion of them, other than that they're described as vampires.