I actually prefer to point fans away from the plants- the air moves in the space fine either way, and you avoid desiccating the plant closest to the fan.
I didn't notice the light is fixed up[ there.
Box retrofit idea: Add eye-bolts and chains to hang lights. Convert the hole into an exhaust duct with a big bad blower. That's an ideal spot for the intake of the exhaust, right over the light, at the highest point in the grow cab.
CRAFTY!!! Nice box.