Does lightning at night emit harmful uv rays?

A2A: Yes. just as the sun does, it emits rays of a sort which can be harmful if you get enough exposure, and it does so whether at night or in the day. read more

A2A: Yes. just as the sun does, it emits rays of a sort which can be harmful if you get enough exposure, and it does so whether at night or in the day. However, in the case of lightning, in order to get enough exposure to be harmed by UV rays, you would have to be close enough that you have more severe problems than those caused by the UV. read more

Lightning discharge is a current of some thousand amperes for milliseconds, and under such conditions you get thermal radiation. (of course not black body, because air is not black :=) This kind of discharge is called a sparc, if it would last longer, it would be called an arc. read more

In particular, incandescent, LED and sodium vapor bulbs all emit very small amounts of UV radiation. According to the National Institutes for Health, Compact Fluorescent Lamps have the potential for emitting ultraviolet light, a high-energy, invisible form of light that can cause sunburn, skin cancers and other problems. read more