I have been using the LED strip light tape for the same type of applications. I did the stairwell to the basement this holiday season. The tape was stuck to the bottom of the handrail. Looks fabulous. I'm not exactly sure how much power the stuff draws, but I had the stairwell rigged up to a 9 watt wall wart for a few days and it ran hot. I stuck a 15 watt wall wart on the strip and it runs much cooler.
The can light at the bottom has a 15 Watt cfl bulb in it, soft white. The strip light is bright white 5050, 60 per meter. It is said to have a power draw of 15 watts per meter, and a luminosity of around 1000 lumens per meter. So my 5 meter strip should be drawing close to 75 watts and delivering 5000 lumens.
Total cost: $7.99 for 10 meters ( 2 each 5 meter strips) and I only used half on the handrail. A 4 lamp 4 foot ceiling fixture would come out about the same.
Compared to the T8 lamps, I would throw 5000 lumens instead of 10000, and use 75 watts instead of 128. Not counting wall warts or ballasts or whatever power supply, I'm happy with a quarter per foot.