My light has 4inch vents on each end should one bring air into the light and the other vent air out of the light? Or both used as exhaust?
ones an intake, the other an exhaust. Dont run your intake where you exit your exhaust, defeats the purpose.
Explore the DIY forum. A little browsing there should clear up how a light should be vented for your particular application. If not, at least you'll be informed of proper ventilation techniques and can ask again. cheers,