Attwood Marine LightArmor All-Round Navigation Light F-Powerbase 30in. Also this navigation light can be adjusted for angled applications. Specifications for Attwood Marine LightArmor All-Round Navigation Light F-Powerbase: Manufacturer: Attwood Marine Light Type: Navigation Features of Attwood Marine LightArmor All-Round Navigation Light F-Powerbase Articulating head adjusts from 15 fore to 15 aft (at near or toward the stern of a ship) Rated for 50000 hours of use Two miles 360 light visibility for boats up to 12 m (39 ft) Meets ABYC & USCG requirements and all applicable standards Compatible only with the Attwood PowerBase (6100-LT-7) Package Contents: Attwood Marine LightArmor All-Round Navigation Light F-Powerbase Attwood Marine 5590-30-7: LightArmor All-Round Navigation Light F-Powerbase 30in