Reducing glare from onboard lights helps preserve your night vision for safer boating when fishing in the dark. One common source of glare is the all-around white overhead navigation light mandated by the US Coast Guard. Hardtops and T-tops block a good bit of the light (particularly on the foredeck), but some white overhead beams still create glare in the aft cockpit. Perko’s Light Glare Shield (about $15) easily clamps to a ¾-inch-diameter light pole directly under the white light to block illumination from blasting the aft cockpit, yet the light still alerts other boaters to your presence. The plastic piece is lightweight, minimizing stress on the pole while underway.