There is no ventilation, I only water heavy during night after the lights go out. I remove the lights at night after the watering (with a fine “duster” type watering spray, so the plants can breathe and the humidity can escape.
The lights are very strong. They basically roast the soil which dries out during the day. I know ventilation is required and a breeze will makes the stems stringer but the plants are growing quite quickly and I will tie them all off individually to a small stick and eventually a bigger stick to offer protection from the wind.
by beardypoop69