These LED lights are sealed in a waterproof housing, therefore giving youre trailer lights there BEST chance at surviving the elements. These Red LED Lights are rated at 100,000 hours and are the brightest lights on the market. These lights perform the turning signal functions, running light, and braking functions. Were including in this kit a 25 foot wiring harness, stainless Steel mounting hardware, and 4 Gel Filled butt connectors. Light Specs: Standard 2 inch center to center measurement for mounting Light measures 3 5/8 in tall by 6 inches long