Well i went to lowes last night, and they have 1 metal halide bulb but no ballasts or anything else. They havent even heard of mh. I found some ballasts on ebay. Anyone have any input on what to look for in a ballast? I found them from $25-$$$$. Do i need screw type or double ended? Also the only wattages i found were 100 and 175. I havent come across many 100 or 175 watt aqua bulbs though.