thank you, so i can use the 250w fluro for vegitive and flowering?im guessin i just turn it off for 12 hours wen i wana flower the plant, do i have to completley seal up the cabinet and make it air tight durin the 12 hour dark period so no light escapes and would it be ok to open the door and rest a fan beside the plant during the 12 hour light period????

sorry for all the questions but how often do i put fertiliser in and if i only want less then 2 foot overall growth then what size pot will i use and can i use that pot for my seedling or will i have to use a smaller pot for the vegitave cycle???? thanks