Really the absorption measurement should have been taken using a broadband lamp (an old light bulb would do). Using a CFL, the signal to noise in the attenuatio

Really the absorption measurement should have been taken using a broadband lamp (an old light bulb would do). Using a CFL, the signal to noise in the attenuation region is pretty poor to begin with. A lot of plastics (e.g. Polycarbonate) attenuate UV - you have to go out of your way to find windows that will pass it. For example: http://www.randombio.com/clear-lucite-spectra.png http://www.randombio.com/clear-lucite-spectra.png