flos alone is good for cloning..maybe veggin...still make your plants stringy and stretchy...but to produce flowers tight u will need at least 50k lumens..which is equal to the sun...i mean , bust the move, go with a 400 hps and a good bulb and you can veg and flower.....
lighting hours like Heads 4 just posted...is a safe bet...in the 12/12 cycle it is important to have total darkness.......with a do not disturb sign up..lol

Too keep plants small a 3 gallon pot and start flowering at 4 weeks will keep it small , plus topping...make sure prior to flowering you top and let the nodes fill in again ...other wise it can shock the plant...If you plan to take clones..go to 6 weeks,,,then flower...good to understand the strain your working with too..
good luck,,,,but yes go with at least 50k lumens,,,,,