Hi! goood question!

Here is one link I found doing Scroogle.com searches on this:

http://ruk.ca/discuss/2461

Seems that flourescent lighting's mercury is more troublesome if you crack a bulb by mistake.

I did read elsewhere that flourescent lighting is bad for animals/plants/and humans-- causes migraines and depression in many people, and the type of spectrum/rays does something to our general health-by lowering the immune system.

If i were you, I'd get those flourescent bulbs the heck out of there and invest in some Full spectrum bulbs at least.

http://www.scroogle.org/cgi-bin/nbbw.cgi

I found some 60 watt full spectrum bulbs for about $6.99 a bulb, but they last forever!