Alliance Outdoor Lighting Alliance BL900 4W 2900K LED Bra...A fully adjustable shroud adds versatility to this sleek, heavy duty fixture with numerous options and an optional color tunable, dimmable Bluetooth LED module. Includes 4W MR16 LED 2900K Flood Lamp Housing: Solid cast brass. Knuckle: Solid cast brass, a knob for angle adjustment. Socket: Spring loaded ceramic bi pin MR16, with dual contacts and lamp clips. Shroud & Lens: Solid cast brass, with dual o ring seal, with convex tempered, shock resistant