You can google it and all the info is their on the gavitas website. yeild were pulling 3 pounds per light on heavy strains and 2 pounds per light with smaller strains 4x4 is really a 5x5 because the tray is pulled out from the wall
Trolmaster is a great controller you can check your room on your phone and get warnings when something isn’t working right example room to hot humidity too high ect