At any rate, I'm saving the receipts and boxes of the new CFLs I buy so I can return them if they don't last as long as they're supposed to. Now I have to find out where to recycle my bulb in St. Paul, which has a small amount of mercury in it. By the way, why is there mercury in a CFL? I'm glad you asked - check out this video:
"The mercury is critical to the operation of a compact fluorescent bulb. It exists in powder form, inside the glass twists of a CFL bulb. When plugged in, the electricity excites the mercury producing ultraviolet energy. Without that process there would be no glow and no light."