Bubblegum + OG Kush Autos

Day 1 of week 6. I've been low stress training these ladies, and trying to get them bushing out as much as possible. I need to harvest exactly 64 days from now., or approx 9 weeks from now. Still feels slow going compared with my last few grows. It has been cold here this time of year and I'm running a tent heater with my extraction running for 15 minutes every hour to keep the tent warmer during the veg stage. Humidity is averaging around 70% which I think is too high. Maybe will double the extraction to 30 minutes on per hour to try to lower the humidity, and then again lower it closer to switching to flower next week. Just been running a battle with low temps, and it seems like a temp vs humidity trade off for this moment. Now my delema: Growing 4 Autos and 4 Photos together. Originally I wanted to make a makeshift area to separate them and finish them off sepately but my wife won't let me. So since it all has to be harvested soon, I'm thinking to run it all on a 12/12 cycle, and flip it a few days from now. I'm hoping that the plants will keep vegging it out a bit and getting taller in size during the initial flower stage, and that exactly 8 weeks from the time I flip them will be enough to get a decent yield from these girls. Ideally I would veg them out for at least another 2 weeks, but I'm having guests around this Christmas, family will be staying over and it all needs to be packed away and concealed by then. I'm also concerned about the 4 Autos running on 12/12, that the yield might suffer a little and was thinking that I could run 13/11 light cycle instead? I can add some additional side lighting during flower to try to get more out of the light cycle.