Ok, what are the Wattages on his other lights? With that fixture, you should get about 8WPG, if my math and your dimensions are correct.
The only problems I see, is there is no name brand, only one ballast (mine has one for each MH
) they are attached to the unit (mine plug in, they tend to be heavy), no moon LEDs (unless you order them separately) and I don't see anything about cooling fans....
BUT, this is a pretty decent price. I am going to move this to General Hardware thread, where more knowledgable folks can help.