I don't like the way they make you bend the metal to hang the light. No reason for that and seems like a flaw to me. They should either pre bend it or give us holes for the hanger.
I went from a 400w in a 39 by 39 by 78 to this 600w of the same brand.... It was well worth the difference in cost to buy and the little extra it cost to operate. Well worth the money!