There were fluorescent bulbs (the long ones) that caused blood poisoning if any of the stuff (powder) inside the bulb got into your blood stream.

Firefighters are concerned about that stuff on fire scenes because mercury boils off at 675 degrees F and flashover occurs between 600-700 degrees F.

Four/five months back people on Mudcat were lauding the new bulbs. Nothing has changed in the interim. As a light bulb they are supposed to be really good. Just don't break any in your house.