I haven't done the math but LED bulbs seem like an interesting alternative to fluorescent. Benefits of LED over fluorescent I think:
- Life is not reduced by frequent on/off cycles. This is an issue for me with a basement shop. I may turn the lights off/on several times a day some days.
- I don't know that light output decreases with age as it does with fluorescent
- No need for the lamps to warm up in cold locations for light output to reach normal.