Ahh the beginner lol...A plant unless it is an auto flowering strain will remain in flower until the light schedule is switched to 12 hours on 12 hours off. Your plant can double to quadruple in height once in flower. Your light bulbs are not worth using. Your burning almost 300 watts of useless light. You should if you have money get a simple 250 watt hps setup should be under $100 with bulb ballast and reflector online or as mention switch to the spiral cfls from home depot. Look for the bigger ones some have 300watt equivs which are actually 75 watts each. I would also go to the new grower sections and read up to learn the basics. Make sure your watering with ph 7 water in dirt. If your going to repot doit a week or 2 before going to flower for best results. Good luck