hps help

Hello, Should I go for 600W MH/HPS or 2x 400W MH/HPS. I was told 800 watt was too much for 120x120, but I still wanted to ask here. The bulb will be air cooled and the ballast, too. Both, the bulb and the ballast will have their own independent cooling system, so the temperature isn't a problem.

I’ve been reading a lot of conflicting information about this. Some people are saying HPS causes more stretch with quicker growth and others are saying MH causes more stretch with quicker growth. Who is right? Does anyone have experience vegging with both? I’m currently in early veg and have...

http://www.zenhydro.com/ipower-grow...gle_shopping&gclid=CMPywIzB0c4CFcdehgodmJgODw My grow cab is 23"×36"×47". I want to know if a lower watt " CoolTube", would be an option in thinking leds but you can't beat hps results. I found one but I'm not sure it's even all there can someone take a...

http://www.zenhydro.com/ipower-grow-lights-6-cool-tube-with-add-on-wing.html?utm_source=google_shopping&gclid=CMPywIzB0c4CFcdehgodmJgODw My grow cab is 23"×36"×47". I want to know if a lower watt " CoolTube", would be an option in thinking leds but you can't beat hps results. I found one...