Ultraviolet Black light is used extensively in multisensory environments to create brilliantly glowing stimulating visual experiences (UV light can make white or fluorescent items glow 20 times brighter than they would in normal sunlight!).
UV lamps are not hazardous, and the strength of the radiation it emits weakens the further you get from it. If you stand at a 4ft distance from the illuminated lamp for two hours, you’d receive the same amount of radiation as you would if you stood outside under the summer sun for 48 seconds!