acurious1ne

LED if you can afford them, CFL if not. There's little difference in their luminous efficacy (aka efficiency) at this point. CFLs have a small amount of mercury in them, so if product neurotoxicity matters to you, go LED.

Second this recommendation. The author was a propellant chemist/raketenmensch and wrote about the subject with passion and humor. A pleasure to read.

Created an account just to thank you for your thoughtful, interesting post.