Top LED: Each light has 12PCS upgrade Piranha LEDs, feature better heat dissipation, wider lighting angle, higher intensity light and extend a longer lifetime, features excellent bright light and extend a longer lifetimeStand Out Brightness: Output 3 time brighter light than others. High brightness for Turn/Brake light, low brightness for Tail light. Improve visibility and ensure you a safer nightEasy Installation: Just surface mount the grommets & light setup, attach the 3-prong plug to light, and then connect the 3 wires lead. Hole size for surface mount is: 4. 3 diameter hole, 2 depthReady For The Weather: Be highly silicon sealed, IP67 waterproof rating, always be ready for different kinds of weather attackUniversal Application: Work on 12V DC system, function as turn/Brake light, tail light for all kinds of trucks, trailers, tractors, semi-trailer, horse trailer, travel trailer, dump Truck, special vehicle, etc. Just make sure the hole size before your purchase