What lights give good spectra?

Alphoid wrote:

Right now, my house is lit mostly by CFLs, and some incandescent bulbs. Especially with the CFLs, but also with the incandescent lights, the quality of portraits -- even with a gray card -- is abysmal. I'd like to swap out for something that will give more natural skin colors. I do not have room in my house for dedicated photography lights (e.g. something on a tripod with an umbrella is out).

Things I'd like (by decreasing importance):

1. Rich spectrum for natural-looking photographs (requirement)
2. Low power consumption (very strong desire; heat is an issue)
3. Fits existing lightbulb sockets, as opposed to e.g. an LED strip to mound on my wall (nice-to-have).
4. Reasonable cost (nice-to-have)

Right now, the room where I most commonly shoot has two CFLs on the ceiling, and a standing/mobile light with 5 CFLs (all at 60-100W equivalent).

Any suggestions on what I should buy to give good (or at least somewhat better) lighting?

(I had posted this in the open forum, but got no responses).