AFB scale glows yellow/green in UV light.  These days UV flashlights are readily available in various wavelenghts and price ranges.

http://www.amazon.com/s?ie=UTF8&keywords=black%20light%20flashlight&rh=i%3Aaps%2Ck%3Ablack%20light%20flashlight&page=1

http://www.amazon.com/Ultra-Violet-Blacklight-Flashlight-7301UV400/dp/B001VZC5LA

http://www.blacklightsusa.com/blacklights1.html?gclid=CLbAudCk7q4CFQ-ChwodHHRnIg


Is anyone on the list using one?  If so, what has been learned?  Does anyone know if one wavelength is better for AFB than another?

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