you could try a UV-B (UVB for searching) 'reptile' bulb: http://www.amazon.com/Exo-Terra-Repti-Glo-Fluorescent-Terrarium/dp/B00101GDIG/ref=sr_1_1?ie=UTF8&qid=1412993860&sr=8-1&keywords=uvb+reptile
UV-B is 280nm-315nm: https://en.wikipedia.org/wiki/Ultraviolet#Subtypes as for filters... umm, *scratches head thinking I should know this*... dichroic mirrors come to mind but I don't know if they'll be cheap Apparently blacklights are coated in 'woods glass' which people use to DIY UV photocameras, but this passes ~365-400nm so still too high. This page links to an ebay listing from Vermont that is selling a bandpass for 325nm for $~45: http://www.savazzi.net/photography/uvpassfilters.html http://www.ebay.co.uk/itm/310295977900?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 That page has lots of other links too, so you'll need to dig a bit. The 'Asahi Spectra' company it links to seems like it has a good selection and I imagine they would be cheap, but there's no prices and being from Taiwan might not make it here for halloween. On Fri, Oct 10, 2014 at 7:09 PM, Paul Stoffregen <[email protected]> wrote: > I'm fiddling with a Halloween decoration idea that involves > glow-in-the-dark material. I bought a couple cheap UV flashlights to > illuminate it. Trouble is, they have quite a lot of visible blue light > output. > > Does anyone know of a material that can pass the UV and filter out most of > the visible blue? > > Or maybe an affordable UV blacklight that doesn't have a lot of visible > blue output? > _______________________________________________ > dorkbotpdx-blabber mailing list > [email protected] > http://music.columbia.edu/mailman/listinfo/dorkbotpdx-blabber > -- -Nathan
_______________________________________________ dorkbotpdx-blabber mailing list [email protected] http://music.columbia.edu/mailman/listinfo/dorkbotpdx-blabber
