Product Feature Usage: Marker lights indicator light, side marker light, led trailer lights, rear light, indicator light, turn signal light, rear tail light, license light, parking light for most Buses/Trucks/Trailers/Lorries. Construction: Made of PC lens Waterproof Shock-Proof Dust Proof. Upgraded LEDs: Use 9 LEDs, featuring better heat dissipation, wider lighting angel, higher light intensity, and longer lifetime, make the light super durable and outputs excellent amber light. Long life span: 120 lumens each light, 50,000hrs life span. EASY TO INSTALL-2 Wires Connection: Black is Negative and Red is Positive. FREE screw sets are included. Product Specification .