The Buyers Products 6 Inch Midship Turn Signal and Side Marker with Reflex and 9 LEDs is an auxiliary marker light used on trailers 30 ft or longer. The design of this light provides extra visibility and serves three functions: side marker, reflector, and turn signal light. The light has an amber lens and features an internal Reflex optic, which eliminates the need for a separate reflector. Lights are backed with a limited lifetime warranty.