The Baja Designs OnX Arc LED light bar is 37" long and puts out 21,500 lumens of light in a driving/combo beam spread. The Baja Designs OnX Arc light bars features a copper core board which offers the best thermal management and allows these OnX Arc LED light bars to be driven harder than any other LED light bar on the market. Driving the LEDs with more power allows Baja Designs to get the more light in a smaller package. You can have more light without having to add the extra weight of all of extra light fixtures. These lights are extremely versatile and offer you the ability to change your lenses on the fly. The Combo beam pattern allows for a wide spread without affecting the beam distance. Baja Designs OnX lights come with a limited lifetime warranty and will last over 49,930 hours.