I've use these ones from Element14 before:
http://au.element14.com/vcc-visual-communications-company/vaol-5guv0t4/led-=
5mm-ultraviolet-160mcd-405nm/dp/1712756

On 15/01/2013 1:39 PM, Sean Breheny wrote:
> Hmmm again. I recently bought some UV LEDs on eBay for about US $0.50
> each. Supposed to be 385nm wavelength. When I tried one, it produced a
> faint visible glow - whiteish blue if I recall correctly, but it
> definitely could make UV-sensitive materials fluoresce (like the
> security bands in US paper currency). Have I been duped or has there
> been a recent breakthrough that makes these kind of UV LEDs cheap? It
> also seems to me that I've seen tiny "blacklight" pens for several
> years now which are intended to check for valid currency. These seem
> to be using LEDs. Am I wrong? The output of these devices definitely
> is not bright blue light.
>

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Unit 8, 10 Hook St, Capalaba 4157 Australia
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Our Web Site: www.audiovisualdevices.com.au
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