Partsam (2 Amber + 2 Red) 2.54x1.06 side marker light (smoke lens-amber/red) Surface Mount Universal Led Marker Clearance Lights, Truck Trailer Lights, Fender Marker Lights indicators 2 Diodes Partsam (2Red + 2Amber) in smoke lens 12v DC Side Marker trailer Light Mini-Sealed LED Surface mount design These are universal.Generally people use them as clearance, side marker or identification light. We also get feedbacks form our customers and they use them for trailer lights 2 for brake lights and two for tail light on each side. Also some put them on motorhome as position lights ... Brightness: 80 lumen each light with 2 pcs High Quality LED Diodes; Universal for Pickups,Truck Trailers,SUV van Caravan and Boat Lorry Bus 64mm x 26mm x 18mm (2.54" x 1.01" x 0.7");the center to center dimension between the screw holes: 46mm (1.8") Easy to install with Free end wire ( Black is Positive: White is Negative/ground ); the wires come out of the back of the light; Two-wire design includes both lead wire and ground wire for mounting to all surfaces;