You can vegetate the plant for 4 weeks, but less if you want to keep it small, then 8-11 weeks to flower, depending on the strain. So your looking at a minimum of 3 months for a full sized plant. But you could knock off 3 weeks if you just want small plants.
Your light might be the problem. I use one of those myself, but if you bought that off ebay, or the one with the red and blue spectrum......you got ripped off. If you buy that light at a hydro store, you'll get the real thing. But they're only good for clones or smaller plants. They aren't enough for hydro or bigger plants. You should buy 1-2 more, or get a HPS.
I knew the light was my problem, I bought a MH and HPS system thats coming, I should put in my MH bulb frist right then HPS for flower? because under that light its been about a month and the plants are about 2-3 inches. Also should I take clones before I start to flower or after it flowers I can turn lights back to 24 hours and would it start to grow for some clones? thanks