Quote Originally Posted by dav4 View Post

How big/what was the height of the enclosure you used when testing out your enclosure? I would guess enclosures with higher ceilings would not have the ambients my enclosure has, keeping everything else equal. Just guessing...
...I just read through one of the earlier posts and saw you were using a 40w RHP and had a 12" ceiling. What was the foot print of the enclosure? I suspect that if I removed the divider to my t8 and disabled one of the RHPs, my ambients would drop significantly.