Let's talk DIY lights

I find my T6 does a half ass job compared to my cheap no name duct fan, the controllers great but the fan just doesn’t have as much juice
What are they 380cmf compared to a standardized 440cmf of a 6inch fan…
I took the carbon filter off for now just to help improve airflow but I wish I would have just got an inkbird controller and a normal fan.
I mean they are quiet but they don’t move as much air! Ugh