Abstract: A lighting system is disclsoed for providing side and/or rear end lighting for a boat trailer characterized by a forward end portion for coupling to a vehicle and a rearwardly-extending cradle portion for supporting a boat, the cradle portion having sides and a rear end. The lighting system is comprised of a housing containing a light source mounted upon the forward end portion of said trailer; and at least one transparent light-transmitting plastic rod disposed at one end in light-transmitting relationship with the light source and extending rearwardly therefrom along the cradle portion to one or more positions thereof to provide lighting at one or more positions of the trailer.