What size sump? Only fixture I have is a 36" that uses pc bulbs. But there's a sump sitting in the garage that belonged to Mel, that we didn't end up using.
let me both recommend and offer.... just use one MH with a good bulb and call it a day. you will love the access and the overall cost is lower with only one bulb to change! I got a few setups..give me a call or text.