Today, I secured a socket extender for use with that n:vision daylight CFL bulb I picked up yesterday. Result: Bright, white, pleasant light, and a decent amount of it. I think I like these bulbs.
Minor downside: The top turn or so of the bulb protrudes above the top of the torchiere's bowl. I think I can live with that, and the next time I buy new lights, I'll just buy them with the shape of these bulbs in mind.
Oh -- and, of course, that every other light in the house now looks yellow ....
Bulb details: n:vision model ESM27, SKU 230-520, 27W, 5500K, 9-year warranty, $6.97 at Home Despot. The manufacturer actually makes medium-base CFLs up to 42W (claimed 150W equivalent), but I don't know whether those are 5500K bulbs.