Just minutes apart come two tweets about compact fluorescent lightbulbs. First this from Revkin:
Edward Hammer, inventor of helical CFL bulb, has died, age 80.
And then this from Ken Green.
Besides being expensive, undimmable, slow-to-brighten, giving off ugly light, and containing mercury, compact fluorescent bulbs apparently give off UV radiation that will damage your skin.
One assumes the close proximity of the tweets is coincidence.