I have one and know its use to control co2 temp and humidity but I was wondering exaclty what devices do I add to it? And I guess how to as well. I know it has a photocell so it reacts to rather the light is on or not. Please help I need help with my project oh as of now my room is ran on a sealed theory I think Sent from my SPH-D700 using Grasscity Forum mobile app