Are under body lights illegal in the state of Arkansas?

Yes, underbody lights are considered illegal in the state of Arkansas. Arkansas has a law that states that "no person shall drive a motor vehicle upon a highway during the hours between sunset and sunrise with lighting equipment emitting any color other than red, yellow, amber, or white and then only projecting toward the front and the sides of the motor vehicle." This law effectively bans underbody lights, as they emit light of a different color than the allowed colors and are not projecting towards the front or sides of the vehicle.