The Best Black Light Versus Uv Light References. Web although black lights produce light in the uv range, their spectrum is mostly confined to the longwave uva region, that is, uv radiation nearest in wavelength to visible light, with low frequency and therefore relatively low energy. I'm looking at putting blacklights up in my room for a couple of blacklight posters.
Ultraviolet (uv) light is a type of electromagnetic radiation. Is a black light a uv light? Nearly all of the light of good black light should be in the uv portion of the spectrum, with very little visible light.
