To share our experience of the past couple of years.
The bulbs we use in our home as well as digital video and still photography are as close to natural sunlight as possible. The bulbs closest to this are 5500 degree Kelvin and 90 CRI -- the closest replication of natural sunlight available. It produces almost 3,000 lumens of full spectrum daylight.
Generally, the lower the Kelvin rating (3,000 and below) the warmer (more yellow) the light is. The higher the Kelvin rating, the closer to daylight (and more bluish).
We buy our CFO bulbs for video and still photography in 200 watt equivalent from Agri-zone in Lancaster, PA. They use these mainly for raising chickens and various aquarium/fish applications. The great advantage of these lights for video and photo work, is you get 500 watt illumination in bulbs that essentially never get hot. If you are a photographer, you can appreciate what this means.
SAVE ENERGY Full Spectrum Compact Fluorescent Bulb 200W - eBay (item 140010284895 end time Mar-14-08 16:15:00 PDT)
eBay has a number of sellers in various watts.
NEW 65 Watt Compact Fluorescent Full Spectrum Photo Bul - eBay (item 290207585081 end time Feb-27-08 17:02:40 PST)
More here also,
Compact Fluorescent full spectrum, Lamps, Lighting, Ceiling Fans, Home Garden items on eBay.com
One trick for shotting video scenes, is to get one of those pole lamps with three cone reflectors (make sure they are white on the inside, not black or brass color). They are about $20 at WalMart. Assemble the pole light and aim the three 74 watt CF lamp at the subject(s). You can use a single clamp on lamp for similar effect, or as a backlight. The result really improve digital video especially.
If you put four 200 watt CFO's in a Britek header (available from Steve Kaiser, among others) that's 800 watts per light. Two of those = 1,600 watts, etc. PLENTY of light. Generally speaking, the more/better lighting, the better your videos will look.
For day to day home use, we buy full spectrum daylight (5,200-5,600K) CFO bulbs in the lower wattages at WalMart, a real force in getting everyone to use CF's. Many WalMarts have very low priced deals in conjunction with local energy companies.
In San Diego, we pay only about .77 cents for the 37 watt CFO bulbs, in daylight temperatures. The link below is to CF's on the WalMart web site. You'll have to check your local WalMart for the super special prices. We use the 27 watt (100 watt equivalence) for most household and lamp applications.
Search results for cfl bulb - Walmart
I also buy at Home Depot. They have good lights, and much more selection in t he "daylight" CF's at higher wattages.
We have switched over the past few years and have nothing but positive experience with compact fluorescent bulbs.