Northern Lights Auto - 2nd shed grow

I think most of the stretching is done as only a small increase in height the last 4 days. Nights have really been so cold the last week and I've been struggling keeping the temp above 14 with heaters set to the max. At a minimum the root zone is keeping comfortable as they are above the heating bars. Hoping the cold doesn't impact the bud development too much, only time will tell.