Quote Originally Posted by Chromophore
You may have answered your own question. The one receiving more light, thus more energy may simply be developing faster. It reached a natural part of the flowering cycle before the HPS plants.


and one last thing to considering...your comparing the wrong thing. Watts is a unit of energy used. The real question is which has more lumens in the correct range...do you know which has more lumens the hps or your t5s?