JerryMawuana
New member
This is my second grow, and first one with HID lights. I have a small 2x4x6 tent with plants that are 3 or 4 weeks old. Should I run my ballast at 400 or 600 watts? I have a good enough fan to keep the temp right regardless. But I'm concerned that 600 might be too much for a small space and I don't want to hurt my plants.