The housing is constructed of double gasketed, die cast marine-grade alloy aluminum for long life. With vibration-proof serrated teeth and the base of the housing, it provides a positive lock. A 360 degree fully adjustable swivel arm allows for precise lighting along with an angled lens for self-cleaning. The fixture is UL, cUL listed for a 50 watt MR16 lamp, also available with a Philips MR16 LED lamp. The socket features a retention clip to secure the lamp in place.