Pro-Troll Strike-Lite Planer Board Safety Lights are essential to keeping you safe on the water after dark. There are two red lights for the port (left) side planer board and two green lights for the starboard (right) side board. These safety lights feature waterproof 3M adhesive to stick to any flat surface. The adhesive lights feature three modes: a slow blink, fast blink, and steady on. Each light provides you with up to 200 hours before needing a replacement.