UV flashlights, which shine ultraviolet light, help make it easier to spot hard-to-see stains on furniture, carpets, and walls. If you have pets, they’ve probably had their share of accidents in your ...

UV won't blind you any faster than any other light, it just increases the risk of cataracts (since the UV light is partially absorbed by then lens in your eye).

Add Yahoo as a preferred source to see more of our stories on Google. Shine an ultraviolet flashlight on flying squirrels, and they glow bright pink. Catch a scorpion on a full moon, and you’ll notice ...