Can UV light be made out of your phone's LED flash?

The LED produces a high frequency light (either violet or UV) and this makes the material fluoresce to produce other colors (lower frequency). Since this fluorescent material isn't 100 percent efficient, some of the UV light could pass through and be mixed in with the white light. read more

Your not making a blacklight. A blacklight is a UV-A bulb. No cell can produce uv light. Your just making the led camera light cobalt. Blue light will make things fluoresce a little but, no where near what uv-a, uv-b, or uv-c bulb will. It's a waste of time. Just go buy a real blacklight blue UV-A light about 24 inches long. There like 15 bucks. read more