Yes, you can use that light thru flowering, BUT, You will need to add 9 to 10 times the wattage of that one light in mostly 2700-3000K range. If you are going all cfl you want mabe smaller bulbs because you need them 1-3 inches from the plant. Go get a 3 in 1 meter for light, ph, moisture and see your light at the bulb and see how fast and how drastic the bud busting power drops as soon as the plant is 3 or more inches away from the light.. vegging is ok but when its time to get busy you need cfl right in the plants grill. You want at LEAST 100 real cfl watts per plant for 2-3ft plants and 150 watts for 4-5 ft plants. per plant.
If you are going with a 600 or 1000 hps then you can use the cfl for lower lighting or keep it seperate and start your cuttings and vegging for right after havest of your crop... this will give you a fresh crop about every 3 months.
