Manning the helm at night calls for strong night vision. Yet bright lights from instruments can temporarily blind you. A device such as the Blue Water LED Dimmer (about $40) can help. Easy to install, this waterproof rotary switch lets you fine-tune the instrument-panel lighting from full illumination to no lighting at all simply by turning the dial. It will work with LED and incandescent lighting. If you would rather have a rocker switch, the Blue Sea Systems Deckhand Dimmer (about $53) uses a Carling-style rocker to dim both LED and incandescent lighting.
