I am not an expert by anymeans. I have used nothing but cfl's in all 4 of my gardens. From seed to full bloom. There are different color cfl's, a warm and almost orange color, and a bright almost blue color.

Home depot, lowe's both sell a huge, 68 watt (300 watt replacement) 4200 lumen 2700k light bulb, that fits a standard lamp/light socket (see photo).
The photo is not the bulbs i use, but almost exactly the same, only mine states the specs above, the specs for the one that is photo'd are as follows:
65w, 3900 lumens, 2700k. The newer version of this bulb is what i have, it is a couple bucks more, but none the less you get the idea!

The bulbs may not fit in a standard fixture as these bulbs are freakin huge! standard socket yes, standard fixture....depends on the design of the fixture.

And yes, any extra light will always be beneficial during flowering, when using cfl's!

hope that helps:rastasmoke:

fyi: I use 10 of these, and can keep temps right at 80* with the lamps less than 6" inches from the tops of the plant's! And have to flower after 4 or 4.5 wk veg, or they get to BIG too fast!
dantej Reviewed by dantej on . CFL Grow. tips? This is my 3 time growing :thumbsup: and im doing it all indoors this time, i have 6 26 watt cfl's on 2 double topped krippy plants. Is it enough light? plants are 7 1/2 weeks old, flowering soon. They are beautiful girls, just wondering if more light might be needed for flowering. Any tips or input would be greatly appreciated. Happy Growing ProfessorGreene:stoned: Rating: 5