Changing out incandescents for CFLs makes sense where the lights are used a lot, but not much sense where lights are seldom used (closets, under stairs, utility rooms, some hallways, exterior lights). LED lights make even less sense in those situations. However, Congress will now require use to replace our incandescent bulbs that are virtually never used with more expensive CFLs. Which makes neither sense nor cents except for light bulb manufacturers. There is a place for each technology – but none of them are panaceas.