Every set of GuideLites is manufactured in the USA. From the patent-pending polymers used in the plastic, to the custom designed solar panels. The GuideLite boat lift light is built to last. GuideLites fit snug into the 2 inch PVC pipe that comes with most boat lifts. The GuideLites can be seen from long distances, but not be blinding while up close. To achieve this, a “glow” effect is created to ensure you can see every boat lift light. So, whether you are looking from 5 feet or 50 feet, you will still be able to know exactly where your boat lift is.