what i have gathered from this is that either bulb will produce a similar quantity and quality of buds. what i am thinking is that metal halide, used all the way through veg. AND flower will lessen stretch and thus might prove beneficial to those of us who are growing lanky sativa dominant plants. am i correct, or out to lunch here ?
i would never grow with MH only through flowering just because i know what the plant prefers spectrum wise for each stage, i know it can be done, but HPS arent made for flowering for nothing.
i have to agree with roger, i ended up just using CFL's with my HPS, since im too cheap to buy a metal halide, works good, you can notice them both doing what their supposed to.
nowadays though there are different types of bulbs that provide so many different spectrums, now they have full spectrum HPS bulbs that im sure provide along the same lines of MH light, so thats a factor to look at also.
Fact: plants veg faster and yield higher under HPS unless your talking ceramic mh.
MH=minimal harvest. I have tried to implement it in my garden and I lost 6 oz for doin it. Get yourself a 400w switchable ballast and a good bulb n fan. If you want enough personal smoke to get you from harvest to harvest, a 400 hps will more than double your yields over a 250 with a little more heat, so a 6" air coiled reflector and fan would be a wiser decision.
Would MH work better for a stealth grow better because of the actual color the light? I feel like blocking the softer MH light would be easier then an HPS. I'm also considering MH to keep plants shorter, but I have 6ft of wall space so I don't think that would be a problem, but not sure as I haven't done a completed grow. Have read that HPS lights can sometimes make plants too tall and lanky and I don't have a huge amount of space to work with 6' tall 1.5' wide. Was gonna go with 250w