Light trap has been designed to the light by maintaining a good airflow. They are affixed to any exhaust fans mounted in end walls. It provides with a very high light reduction and a minimal air flow resistance. It is engineered to provide the best blackout conditions in your building. This allows for open ventilation and efficient air exchange while in blackout mode. Lightweight construction means low freight costs and easy one-person handling. Light traps are manufactured in convenient, easy to handle sizes.