I've been using full-spectrum fluorescent bulbs and lamps for 12 years. I wouldn't use anything else. I prize them for their light quality, lack of heat, color accuracy, and ease on the eyes for reading more than anything else.
The economy and longevity (I usually get 3-4 yrs. from a tube or bulb) is gravy.
OTT-Lites .. they're the best.
The prices I’ve seen for daylight 100w equivalent CFs run about $14/bulb ordinary incandescents cost about $.50 so these are 28 times as expensive and since I’ve never had one last as long as 5 x they just are too expensive to make sense yet. The $1.50 ones from costco make sense, but not the $14.00 bulbs.