Autopilot CUMULUS S50 Digital CO2 ControllerMaintaining CO2 levels at the grow room could be the deciding factor for your plants' health and growth. The Autopilot cumulus gives you complete control over measuring and controlling the CO2 levels inside your room. You can keep a complete check over the ppm readings to 1 ppm resolution. The grow light can be mounted on the walls and grow tents easily. LED Mode: The LED on the controller displays the CO2 levels clearly and indicates the errors, so