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When I originally heard about the effect of Fluorescent lighting on sleep, it was on the radio, and it was before CFL’s came out. It was referring to people who worked under fluorescent lighting at work, and to the best of my recollection, it was that if you are exposed for more than one hour under the light, it interferes with (I believe it was) melatonin regulation, and that exposure of one hour or longer would cause you to have difficulty sleeping for the next 3 hours. I just did a quick internet search, and there are several pages (Just search CFL or Fluorescent lighting, and sleep disruption).

Here is one link to an eHow page, not exactly authoritative in my book, but at the bottom of the page there are almost 2 dozen references to look at:

“Dangers of CFL Light Bulbs”
http://www.ehow.co.uk/info_8381769_dangers-cfl-light-bulbs.html

I also found on Soundsleeping.org that it says that artificial lighting (both Incandescent and Fluorescent) lighting causes your body to think that days are longer, but it was not specific, or well referenced. I’ll try and find more info and get back to you, but the eHow references are probably a good place to start.