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Looks like your doin fine. You can start to flower anytime you want. ANYTIME! Also remember, thers no such thing as too much light. Some people (plants) can have more than others(plants). We all do the best we can. Keep whatever light you have very close to your plants. Keep reading around in here, and let 'em grow!
Good luck!
Here's my grow-
1st grow 30 days in...CFL