* The bottom aperture reduces glare at 7.5 degrees below horizontal * Patented Articulating Head adjusts from 15 degrees forward to 15 degrees aft * Just align to the horizon and tighten the adjustment screw * Attwood"s proprietary optics design draws only 1.8 watts at 12VDC * Lights are rated for 50,000+ hours of use * Two-mile, 360 degrees visibility for boats up to 39.4" (12m) * Locking collar with universal fit * Use with a wide variety of Attwood 2-pin straight or angled bases * Works as replacement in competitive bases * Length: 24"