Review Of Black Light Bulb Vs Black Light References. These black lights produce a specific wavelength of uv energy (350nm to 410nm) which is invisible to the naked eye and safe for human skin. Web energy kicks mercury atom electrons into a higher energy level and photons in the ultraviolet range are released when the electrons return to a lower energy, stable state.

The uva light that is emitted by the bulbs react with external phosphors, and those phosphors glow so long as they’re exposed to the uva light. These bulbs are perhaps most famously used in bug lights, or bug zappers. Terms for black light bulbs are a bit different than for the fixtures.