Tubes are the old reliable: big, cheaper, and they put out a ton of the right kind of light. LEDs are more expensive by comparison (or there were a couple years back) but you can do different things with them. I have 100w led flood lights that are blacklights. Work just fine for me. The DP would have to add additional light sources to increase the visible UV range to achieve the same effect. This is a tough balance to master, as visible light will easily overpower the Although time outside and in the sun can feel nice and is good for us, it does expose our skin and eyes to UV rays. There are two types of rays: UVA and UVB rays. Too much exposure to either type can cause short and long-term damage to the eyes, such as: Damage to the macula, which impacts our central vision. Damage to the cornea and lens. Black lights can emit either long-wave or short-wave UV light, with the former more common in consumer products because of their lower risk of eye damage. There are usually two types of UV black lights: fluorescent blacklights and LED blacklights. The big difference between a regular UV light and a black light, that is, is the filter. Black Understanding Black Light. Black light is a type of ultraviolet (UV) light, which is a form of electromagnetic radiation. UV radiation has a shorter wavelength than visible light, which makes it invisible to the human eye. Black lights emit UV-A light, which is in the range of 315 to 400 nanometers. Although the play on words isn't lost on me, the commercially available as "black light" type florescent bulbs are "barely" into the UV spectrum either. As far as light output goes, 100w UV LED's are available, although they are on the bare cusp of being qualified as outputting UV @ 380-385 nm. Although they aren't commercially viable due to costs. True. Which is exactly why space is seemed black/dark to our vision; it was redshifted to "oblivion" due to the expansion of space. The only visible light left for us was from the stars itself. Edit - Which, of course, I was referring to the Cosmic Background Radiation: is an electromagnetic radiation (literally means light) which is a remnant The phosphors absorb the UV, making them safe, and emit visible light. Is UV and blacklight the same? A blacklight (or often black light), also referred to as a UV-A light, Wood’s lamp, or ultraviolet light, is a lamp that emits long-wave (UV-A) ultraviolet light and very little visible light. This stands for “blacklight”. HUJ3au.