So, people like us talk a lot about CFLs. But everything has a catch, and one of the biggies for CFLs is their mercury content. (Although it's important to note that they still contain less mercury than coal plants release into the atmosphere through the use of incandescents.) Still, it's important to do right, and that's why it's good that the Illinois EPA, Sangamon County, and City of Springfield offer a yearly hazardous waste collection at the Fairground. This year, it's on April 21 (click here for other dates and locations in other counties), and here's what they will and won't take.
I didn't make it last year, but I had a CFL blow out a couple of months ago that I stuck in a draw. If I were smart, what I'd do is get a crate, designate it for hazardous waste, print out the list of what's acceptable to deposit, and put stuff into it throughout the year, so that it's just a matter of taking the one crate every year.
Sadly, though I've seen signs for this year's collection around work, it doesn't look like the marketing is out there yet. In particular, I can't find a website for it, other than the EPA's, which is limited to what the EPA itself will guarantee. So, how about Springfield and Sangamon County? Let's see a website for this.