This is an add-on feature for any tall profile light panel (2" height).
These are plug&play replaceable fans that create front to back airflow across the top of your display. They're wired up to exist on their own independent channel and be controlled by the NL502 digital controller (sold separately), running off channel 4 on any of the various Controller configurations sold here.
My default programming is to run them for 1 hour, three times a day (6am, noon, 6pm). The touchscreen NL502 makes it easy to edit the default programming for your unique environment, situation and needs.