It's not just watts, it's wavelength....use the MH for veggin...hps for flower for best results...you can even add the hps to the MH for late flowering...supposedly it helps yields.
TANKJR Reviewed by TANKJR on . Quick Question about MH/HPS , Please help guys Just wondering what would be more benificial for vegging my ladys , either a 400 Watt MH or a 600 Watt HPS ?? I know that they like MH for veg , just wondering if the other 200 Watts id be putting out , even though mostly the red spectrum ... would be better than the 400 W MH . Thanks for any help Rating: 5