these cfls probly dont have the output to bloom (unless you use a few of em)but will be fine for clones and casual growth in the growing cycle. i spent 400$ a peice on my 8 light ballast cfls. they work wonders!! the light itself barley gets 80f so the stalks can all but touch em be4 they burn!! one light can bloom roughly 20-25 plants!! this cfl rivals a 500 watt hps just minus the heat, pluss it uses half the electricity and the bulbs last up to 4 times longer... it was a great investment.... -never use tinted bulbs though-yeah, the bulbs you have would be ideal for flowering.. well actually an hps would be IDEAL, but if your into CFLs... Also, they make CFLs in the 6700K range that would be great for vegging.. i have just standard CFLs, 27 watters... doesn't say anything about the color temp, but they had more lumen output than the 6700k, and they were five for twelve bucks at ace, so i was down