I wonder if the GU24 versions of the CFLs are built ‘to fail’ for the purpose of profit. I am noticing several comments in other ‘blogs’ and ratings boards that these are failing fairly quickly. No such comments on the E26 CFLs, and mine have been lasting a while.
So we end up saving ‘CO2’, but putting mercury(a toxic heavy metal) into the environment (most people toss the CFLs into the trash instead of haz-waste disposal)