Hi Art, I've been waiting for someone who knows more about this sort of thing to answer but I'll add my 2cents worth. Fluorescent lights do run warm, so you can expect some output. The tubular types have heaters in them to get them started so this could be expected to show up as well. CFLs start using a high voltage so they could be less of a problem. The glass itself should attenuate the IR somewhat, but I don't know how much. OTOH, as it warms up, I'd expect it to emit some long wavelength IR itself. Mostly guesswork though RP On 3 November 2015 at 08:11, Art wrote: > Hi all, > > I'm considering use of an IR sensitive sensor (9 to 13 uM) in a project. > Before I commit, I'd like to know if fluorescent lighting can interfere > because it might have output in the 9 to 13 uM range. All the web > searches I can find give spectra output information in the visible and > near IR ranges only. > > Does anyone have info about this? > > Thanks, > > Art > > > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .