Built For Tough Environments - The Light is Made of Aluminum Tube&Base. This provide for Using as an Important Piece of Safety equipment on your boat and function in all weather conditions Replaceable LED bulbs and We Provide an Additional Bulb so Combine with Our Sturdy Design You Can Use the Light for a Pretty Long Time Water and Dust Proofing: IP66, 3 Nautical Mile Visibility Can be used as an all-round white light on power-driven boats up to 39.4' (12m) long, or anchor light on boats up to 165' (50m). Wider Input Voltage: Provide a Wider Range of Input voltages of 12 to 24-volt system on your boat.