![]() A few 18" to 24" tubes put out an amazing amount of UV and will make fluorescent dyes and paints really pop. UV fluorescent tubes are getting pretty cheap now though. The purple incandescent "black light" bulbs are just regular light bulbs with deep purple coloring. UV "bug zapper" lights are not made of this glass so the resulting visible spectrum light makes the output look like a light blue color instead of the deep purple of a black light. They are designed to produce mainly UV light, and the small amount of visible spectrum light gets blocked by glass from emitting. Most UV tubes (the regular black light ones that you get for decoration anyway) are made of the same glass. The problem with these is that they probably wouldn't have enough output to use with a live subject. It also get extremely hot because the blocked visible light is turned into heat. However, since that's not what a tungsten filament is designed for, the amount is very small and the light is very inefficient. Thus the small amount of UV light that is produced by a tungsten filament is the only light that is transmitted through the glass. The incandescent black light bulbs are made of a special glass, called "Wood Glass" that blocks visible light. I was referencing the UV flashes linked to by very1silent. Nionyn: Sorry, I was typing my reply when you posted. I used black light gels to light this one.ĭavid, yer too funny. Nionyn: cool option, the closest one is probably 3 to 7 hours away from me, but I'll check into it. : so even if I went the woodglass route, a 1200ws head I'm guessing has a UV filter coating on the tube? its exactly what you are asking for and i linked to it on roscoes sight.īut it is a filter, it only works if your light source produces UV light in the first place, which strobes do not make very much of afaik. UV fluorescent tubes are largely unfiltered. The "normal" fluorescent lights generate a whole lot of UV, and then use a phosphor coating to absorb the UV and emit visible light. There are a whole batch of different lighting technologies, each of which works differently. Jeastburn: I'm very unclear on what you're trying to describe when you say "black light bulb ". Why isn't there a sheet of glass with the coating somewhere? The regular bulbs with the coating just seem like stand tung. So the coating on the black light bulb isn't what makes it a black light? If you have really high power strobes that are not UV filtered you may be able to use the woodglass gel from roscoe to filter all but the UV light. take a look at the graphs on the following page UV blacklight wavelengths are around 300-400nm. Xenon strobes do not emit much UV light, on top of that, many strobes are filtered to restrict this UV light output. I think "50 Black Lights" would be cheaper. I've used them a lot in theatre (usually in pairs) to light whole stage-width scenes. You could hire a UV 'Canon' which is a powerful UV bulb in a reflector. If you go with true UV you would not have to use 50 UV lights. Take a look at for somebody who appears to be selling some used ultraviolet-adapted flash gear. There are also some flashes (notably the Nikon SB-140) which are designed to generate a lot of ultraviolet light. ![]() A lot of flashes have an internal shield to prevent it from escaping, and some have coatings on their flash tubes which aren't easily removed. Ultraviolet light is generally considered an undesirable output from a strobe. It's a wonderful colour but will eat up a whole lot of light - to the point where you'll be hard pressed to use a low ISO and narrow aperture. You can get a similar effect (but it is only similar, not the same) by using a really deep, saturated purplish colour such as Lee's Congo Blue (#181, I think). I think you'll have to get real black lights if you want to do this.īlacklight is Ultra Violet - you cannot get that from a light source that does not emit UV, whatever filter you use. UV is outside of the visible spectrum, so my guess would be no. Hmmm, never heard of this being done with strobes. Would normal strobes actually produce UV radiation? Originally posted at 9:35AM, 5 March 2009 PST I did call Rosco and they don't make any, but said I could stack 2 colors and get a "simulated black light effect" but it wouldn't affect colors like a black light will. would like to shoot at a lowish ISO and get a high depth of field. Don't really want to buy 50 black lights and was hoping to gel my strobes. ![]() Been asked to shoot some models with black light / UV makeup.
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