yo i want to force flower a plant like 2 inches bigger than this one, it hasn't showed its sex yet, what will happen?it all depends on what your doin. i wouldn't use anything under 23w . it will realy slow down growth. i've learned this from from my last grow that sucked. here some pics of last grow with bad lighting. that plant was a month old, then look at my plant in this journal and youll see the difference. good luck.