Awesome Brightness: Each tail light has 10PCS high-quality 3030 SMD LEDs to output super bright red/amber/white light. The upgraded aluminum substrate dissipates heat faster, helps stabilize the circuit, and effectively extends the lifespan of the lights. | Easy Installation: Comes with grommets for surface mount, also added a 3-prong watertight plug with attached wire. For installation, just need to surface mount the grommets & light setup, and then connect the 3 wires to the corresponding wires on vehicles. Hole size for surface mount is: 6. 6” x2. 5” x 1. 75”. If there are no reserved holes, you can use our size cardboard to drill holes | Upgraded Unique Design: Light has unique “ears” on its two sides, upgrade notches on the inside of grommet, and a tighter attaching ability between 3-prong plug and it. These help the light fit perfectly and firmly on the grommet, and the 3-prong plug attaches tightly on the light. Shakeproof, there will be no worries of loosing light or wire | Ready For The Weather: The light adopts a fully sealed design, achieving IP67 waterproof rating, waterproof and dustproof, and can be used in any weather. Extend the lifespan of the lights | Universal Application: Work on 12V DC system, function as stop/turn/reverse 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.