I have the Apollo 400 w, same as the one your looking @ in 1000. The cool tube hood is thinner glass than the one I bought at HTG supply for my 1000 in flower tent. Dont know how your hood will be. However, ive had the 400 in my veg tent with 4" duct (note: 6"-4" reducer used) and a 200 CFM 4" fan, and its plenty cool. So a 6" fan with ductwork would work fine on that 1000. Its been on for about a yr @ 18/6, no problems. I would agree that when you need a new bulb, upgrade. Overall id say im satisfied with my purchase.