J&D Manufacturing Intake Power Shutter with Light TrapJ&Ds Intake Power Shutter with Light Trap is a crucial piece of your light deprivation system. J&Ds Intake Power Shutter with Light Trap is the first stage in your light deprivation ventilation system. Providing a controlled inlet for the outside air to enter your building while maintaining your controlled lighting needs. Using light deprivation to control plant and animal growth is a strategy many growers are implementing today. For greenhouses,