This is my second grow. My grow room is a simple 3x 3 room with 5 shop lights vertically mounted and a 250 watt mh Sun System. I spliced in my HVAC lines and keep the room between 75-85 degrees. The main light has the optional glass and is vented with a 4" tube with inline fan. My plants are in the 4th week of flowering. How do I look and what can I do to improve the grow?