short answer: sometimes
long answer: i hope you realize that any light is "radiation", also the specific spectrum produced is based on the minerals used to create the light and you can get Light Emitting Diodes that emit UltraViolet radiation in the long wave visible spectrum. there are three basic types of ultraviolet light, uva, uvb, and uvc. uva is harmless and the last two are the cause of sunburn and skin cancer but are almost impossible to produce with an led and no consumer led does this so if your worried about possible negative health effects your safe. if you wish have a cool looking black light then simply search Google for UV flashlight and you will find many led flashlights.
long answer: i hope you realize that any light is "radiation", also the specific spectrum produced is based on the minerals used to create the light and you can get Light Emitting Diodes that emit UltraViolet radiation in the long wave visible spectrum. there are three basic types of ultraviolet light, uva, uvb, and uvc. uva is harmless and the last two are the cause of sunburn and skin cancer but are almost impossible to produce with an led and no consumer led does this so if your worried about possible negative health effects your safe. if you wish have a cool looking black light then simply search Google for UV flashlight and you will find many led flashlights.
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Yes, because it is a LED and it produces light.