Incandescents release more mercury into the enviroment over the course of their lifetime because they use more electricity, since much electricity is based on coal mining (which inevitably releases some mercury). [1]
Also, if you're concerned about CFL taking more energy to manufacture and recycle, also consider the fact that a typical CFL lasts the lifetime of multiple incandescent bulbs.
(Note: I'm not trying to make any particular point other than the only valid way to compare two technogies is with a proper cradle to grave analysis)
Also, if you're concerned about CFL taking more energy to manufacture and recycle, also consider the fact that a typical CFL lasts the lifetime of multiple incandescent bulbs.
(Note: I'm not trying to make any particular point other than the only valid way to compare two technogies is with a proper cradle to grave analysis)
[1] http://www.nrdc.org/legislation/files/lightbulbmercury.pdf