Now that the ban on incandescent light bulbs has gone into effect in the UK - it is being discovered that CFL bulbs are a poor lighting alternative.
From the BBC and Fox News -
Study Casts Dim Light on Energy-Efficient Bulbs
They're billed as energy-efficient, but compact fluorescent bulbs are getting a dim review in a new study. The study, published in Engineering and Technology magazine, shows the energy-efficient light bulbs lose on average 22 percent of their brightness over their lifetime, the BBC reports.
Wait until the true environmental cost of a "green" technology that requires Mercury to work starts piling up.