Most "UV" LEDs sold are actually violet at around 395-400nm and they are pretty monochromatic so there is just nothing to filter. Look for some leds around the 365nm mark, they are available and cost a bit more but they are the same basic wavelength as a traditional fluorescent blacklight.
-Jerry On Friday, October 10, 2014, 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 >
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