These bulbs not as bright as older bulbs, can over heat and cause fires, and if you break them be prepared for a hazardous material procedure because of the Mercury . Mercury is very dangerous and toxic, and is contained in all these new bulbs. You can't throw a Mercury bulb in the garbage, they must be disposed of appropriately according to government hazardous material guidelines.
source: http://nation.foxnews.com/culture/2011/05/10/thousands-energy-saving-light-bulbs-recalled