never used t5 in my grows ive used t8 bulbs and even t12 but t5 is far beeter there is a thread on t5 tubes check indoor lighting i no theres a long ass thread about it and they also grew some good plants from there t5 grow so i no you'll be ok that plant looks great! good growth!!!

you should get really good and wonderfull yield with those light's and from my grows ive notice that plants grow faster when your temp doesnt get any higher then 75 mine lately has been 72 and at night around 65 but not sating wont grow around 85 it will but not fast for me!!!!

all in all keep doing what you'r doin iiiiiiiittttttttsssss greeeeaaaattt!!!!!!