hey i am new to medical grow side of the plants i got c99 and ptr growing 2 moths under 40,000 lum t5 light i runt light 9am to 9 pm off 9pm to 9am leaving only one cfl light
on untill the 9am come then turn on the t5 but only use 4 out of 8 lights on the t5 doing for 2 months ptr is 6'' tall...