Winter's Autoflower Grow - Run 10

Week 2. For some reason both Blue Mammoth are lagging a bit behind. Anyway, it is of no consequence. In a few days plants should be ready for topping. Also, roots are starting to poke out of the smartpots and into the perlite bed, I wonder if they will grow into the perlite and if they do what will that do to their growth rate. It has been so cold that I decided to go to full light power early, at the very least it will keep the grow box warmer, perhaps it will help develop the plants faster?