My plants are about 4 weeks old now and about 8-10 inches and I'm going to flower soon due to the lack of space, there are about 8 nodes and there are about 2 mor growing out now. These plants are growing about two inches a day under a 15 florecent, and plain water in soil, I prepared the water by rinning through my coffee maker twice bottled let cool (with cap off) and growth is now boombing! Should I flower what should I worry about? (Switching from 15watt to a 70watt hps?) anything else I need to know about your help is appreciated.