Vortex Inline Tube Axial Fan Terp Derp while using the hole furthest

while using the hole furthest from the lamp will give the widest light spread

Depending on the size of your cartridge

the V-Series fans operate at lower RPM (1500 to 1700)

XTRASUN 49" PARABOLIC HV REFLECTORS

and plant uptake

Vortex Inline Tube Axial Fan Terp Derp while using the hole furthestVTA Series The Vortex Powerfan VTA Series axial in line fans are ideal to boost airflow. These compact, powerful and quiet fans come completely wired with junction box, strain relief and power cord. Light weight and easy to install, they are fluted on both ends to ease connection to ducting. Available in duct diameters from 4 to 10 Airflow capacity up to 411 CFM Can be mounted in any position ETL Listed