Fair enough, can't judge plants from old pics. Hope they turn out amazing for you, there are some nice looking colas there. I know plants have a cycle and during dark starches are moved to the roots. During the lights on period those starches move back up into the plant. Don't know that extended dark periods are useful but I know some do it. Either way it won't do any harm. As for fattening up the trichomes, I am not sure about that either. I know that some say it but I am not sure it has been proven out. You can increase trichome production with uva, you can force thc to get stronger as a defence from short bursts of uvb but just chilling the root zone with cold water, I am not sure about that one. Trichomes are produced as a defence against the sun's radiation. You know what, I am just droning on now, I could be wrong. Never type after 10 shots of whiskey and 3 joints. No matter what a this point you chopped, the colas looked nice, I hope it is the best weed ever bud.