LED Bulbs Are Now as Efficient as Fluorescent Tubes

They are affordable too.   This bulb currently cranks out 80 lumens per watt for under $11:
http://www.amazon.com/G7-Power-G7A19W10-Omni-Directional-Dimmable/dp/B00AN1OQMO/ref=pd_cp_hi_3

But next year there will be better ones.