unnecessarily pedantic /2
If it is specifically *light from The Sun*, why doesn't moonlight cause issues since it's just reflected sunlight? Is it *our Sun* or any star? Like, could vampires live just fine in Alpha Centauri? How come starlight doesn't hurt them at night? That's also light from a star. Does diffraction or refraction of the light make any difference? What about radio light from the sun? Gamma rays? Neutrinos?