Just got a new ballast capable of hps and mh, 400w i think this will be enough for 2 in a closet. Im running a mh bulb now, would it be a good idea to switch to hps for flower?
Yes, 400 Watts is more than enough for two plants. You could probably increase to 4-6 plants if you wanted to. As for the switch. Yes, it is a good idea. HPS provides better light for flowering. HPS has more orange and red light and that is good for flowering. Smart move buying the convertible ballast. But, I promise you at some point in the future you will buy another light so that you can have a continuous grow cycle. I survived with a switchable 250W for a while but had to splurge on a 400W HPS down the road because my grow cycle was too long. So, in the long run I guess I wish I would have just bought a 400W HPS and a 400W MH. But, you live and learn right. Sorry, a little baked right now. Sorry for the rambling there.
why not clone? and calculate your weekly smokings? like basically have a cycle that produces monthly. so you get your 4 zones, and you conserve throughout till your next cycle.
I do clone. I have three grow rooms. One for clones (150W CFL), one for vegging (250W MH) and one for flowering (400W HPS). I harvest about once a month and it works great for me.