attwood Articulating Anti-Glare All-Round Pole Lights Attwood's anti-glare lights are a great improvement  they focus light at the horizon and above, not in the pilot's eyes. The bottom aperture reduces glare at 7.5 Degree below horizontal. Above horizontal, the continuous arc of light makes the boat more visible to taller craft The patented Articulating Head adjusts from 15 Degree forward to 15 Degree aft. Just align to the horizon and tighten the adjustment screw! Simplifies inventory because one light fits most angles and installations Simplifies installation, too, because the universal locking collar pole fits 95% of existing bases  Attwood models as well as competitive bases such as perko brand