>>13768327Interesting question. I'd say UVC since it's a great disinfectant, but it's not present in daylight. I'd say that if you wanted to figure it out, you'd have to look at the UV present in daylight on a sunny day and contrast it to UV present in moonlight during a full moon.
Personally think it makes more sense for them to be harmed by infrared, since another common recommended method used for killing vampires was burning them, and UV doesn't get you nearly as hot as IR.
