This stainless steel lamp is marine grade stainless steel, and works well in corrosive environments. Note that stainless steel is not stainproof steel, and if installed in a marine environment, you may experience surface staining or "tea stains." The polished finish option gives the best corrosion resistance.
This light uses 21 watts of power, and comes with a driver. It gives 1000 lumens of warm white light, and has a 60 degree beam angle.