I have heard fluorescent light bulbs (those ones that are all spiraled together) may contain small amounts of teflon which can produce fumes. I cannot speak to the validity of this at all. But I can say this -- why not get LED lights instead? These are far more energy efficient (consume less electricity) than both fluorescent and incandescent light bulbs, they generate far less heat, will practically last forever, and very likely have no PTFE. A few bucks more but totally worth it.