OMB, maybe you meant to say sativa dominant strains and equatorial light time? Mango Haze is mostly sativa and most of my phenotypes are sativa dominant. I don't know what you are referring to as far as 12/12 cutting 2 weeks to a month off the turn. The total time for the grow, start to finish will be somewhat less, the difference between running lights for 12 hours vs 18 hours for the early part of the grow saves a bit of energy. But you would expect a decrease in yield, all things being equal. But when one has height restrictions and growing haze strains one needs to do things a little differently. I usually veg for eight weeks but this strain would have been difficult to train, even with topping and LST. These strains can flower for an unbelievable long time too. Some phenotypes (with the real good sativa traits) can go 16, 20 weeks. So I'm now finishing week 15 from germination and I have a couple of phenotypes looking to finish soon. And there is one that will be the last bush standing, It should be the largest by height and weight and hopefully have the goods I'm after.

This cold snap, sub zero Fahrenheit temps for days at a time, is creating some serious challenges. With the strong wind last night the house temperature dipped below 60º! This is a well insulated home, thermal pane windows etc. The hot water circulator runs non-stop. The grow area gets up to temperature easily with lights on but at night it needs more heat so I'm using a space heater during lights out. I also warm up the plant's water to >80º.