Just wondering if there is a "too" high for an enclosure? Ceilings are 9 feet from the floor. Enclosure is 4 foot tall and the cabinet it will sit on is 35 inches. Then I added casters to the bottom to make it a bit easier to move. I will have about 21-22 inches clearance from the top of the enclosure to the ceiling. Plenty enough for the vivosun 4 bulb fixture and the heat bulb fixture, but not by a lot. Seems like it might be too high?