I stand corrected. Here's another similar story.
http://www.mikeholt.com/mojonewsarchive/Safety-HTML/HTML/State-to-Warn-About-Halide-Light-Dangers~20050314.php
I and my wife have noticed that when we walk into some of the big box stores we start feeling kind of weird and the only thing I could figure out was that it had something to do with the lights.