roots hate light and cold wrap those plastic containers with something like thermal blanketing or foil height restrictions will become a problem if that chamber behind the plants is where your flowering might wanna look into LSTing by the way rule of thumb for plant growth is for every foot of height more or less a gallon of soil personally i ont live by that rule bu udefinitly need toget them alil more root space..remember roots hate light when picking a transplanting container..other then that safe growing good luck