Ok i have yet to start my first grow but before i do i had a question. While i'm vegging my plants i was thinking of using the 400w Mh then swithing to 400w Hps for flowering, what are yall's thoughts/opinions on this?
Sounds good, provided those are appropriate wattage/lumen outputs for the size of your grow. You could use one fixture and one of the bulbs a conversion bulb.