This energy efficient and attractive blue led underwater light with stainless steel housing is easily installed on the surface and does not require a through hull installation. Material: Stainless steel 316. Housing color: Polished stainless steel. Led quantity: 27. Led color: Blue. Working voltage: 10-30 vdc. Wattage: 3.6w. Beam angle: 120. Led life time: 50000 hrs. Effective lumen 74lm. Ip rating 68. Instruction is included. Item# p00301bu. Dimension: 3 3/4" x 1 5/8" x 3/4".