I hate energy saving bulbs. The light is horrible, dim and uneven. These however are a revelation. I replaced 6 of our bulbs today and the house is bright ( however, not shiny, as all dust and cobwebs are now revealed) and my spirits are lifted.
I'm not being sponsored, honestly, and this is not a viral marketing campaign, but get these bulbs if you need to sew in the winter in the northern hemisphere.