Pacific Dualies 40005 4 Inch Amber LED Tail and Brake with Amber Lens Plug and Grommet null null null null null High Intensity LED LED has a larger surface area to the circuit board which helps prevent damage from vibration and shock High intensity LED for better visibility Lenses are made of high impact polycarbonate The back of the circuit boards are filled with epoxy resin to prevent damage from moisture, vibration, and shock