I'm using the PHILIPS Energy Saving Bulb that I get from Costco. They use 13w and give the light output of a 60w regular bulb. I am sure its like the bulb K F H is using. I like the idea of the socket extenders for the globe. If I remember to look for them I will try one.
Pump lights up at Dusk and off at Daylight. They get warm but not HOT and I do not notice a jump in the electric bill.
Mike