I'm trying to put a couple of MH bulbs on my 55 gallon tank. I'm thinking about 2 250 watt MH bulbs. I ran across this on ebay, and since I am not too knowledgeable about MH, I thought I'd ask. With the kind of sockets that are given, will that limit the bulb type that I can get? Also, will the ballast provide any limitations regarding bulb type or others that I'm not thinking about? Thanks for the help.

Eric