I am growing two super lemon haze as well. Watch out because it needs about an extra week of 12/12 to fully mature. At least mine did and I'm doing a dwc setup under 400 watts of light. They usually go a full nine weeks and they are ripe and ready to cut.
I had that issue when the weather got cold. I had to switch from 9am to 9 pm to 9pm to 9am. I just left the lights off instead of on for 24 hours. Didn't seem to hurt them this late in the game. Mine were three weeks from harvest. The light keeps my temps inside the room at a decent 78-84f at night.
I am starting a new project for the Christmas break. I want to build a small and stealthy grow cabinet. I can only go with the Sun Systems HPS 150 light setup. Really don't want to have any more power consumption than that right now. What type air ventilation will I need for this cabinet? It...