As with any greenhouse, airflow within a light deprivation greenhouse is still crucial to your plants capability to survive. But how to allow for proper air exchange while still maintaining a light tight environment? Fullbloom Light Traps make use of black plastic fins to block light from entering your greenhouse while still providing the ability for the negative air pressure created by your exhaust fans to pull fresh air into the structure. This 30″ Light Trap is ideal for use with exhaust fans and or passive/motorized air intakes. Commonly used alongside Fullbloom’s 24″ fans and louvers/shutters.