I started with MH in 2003/04. First with DE and then after the lamps only lasted 8 months I switched to SE. I still use the original Coral vue ballast from then along with 12K Reeflux lamps that I change when my FTC meter tells me to. The key issue is keeping the lamps dry and clean away from salt spray. I found that running a multi-speed fan in my canopy helps keep everything dry 24/7.