ok so i have 9 clones in soil sitting under 2 4ft fluoros and the majority of them are looking healthy. they are in my closet which has two sliding doors and i have a fan(like in your bathroom ceiling) that sucks air in one side..and pushes it out the other(thanks to my electrician friend). during the day i leave the closet door open for more airflow but at night i close it so i can sleep without being blinded. when i wake up in the mornings the plants look a lot less perky as if they didnt get enough ventalation. should i keep the doors open at night or is it that big of a deal?