you definatley wanna switch back to mh and save the hps for flower, hps may seem to make your plants grow faster but mh puts off a different spectrum thats crucial for veg, it will help you get those short and bushy plants apposed to tall skinny plants from hps

there is also a theory that seeds arent sexually pre determined and since its a very indepth subject i chose not to go into at this time, high blue spectrum during the 3rd and 4th week of veg(when the plant determines sexuality) promote more females apposed to hps a red spectrum promoting males, unless your growing clones it doesnt matter cause your already sexually mature

but i repeat, i highly recommend going back to mh and saving the hps for flower you definatley will appriciate the results