The Red Mini ID Light Bar can be used as a clearance or side marker light on your trailer or vehicle and should be used for towing applications on trailers over 80 in. wide. It increases visibility to notify other drivers of your trailer or vehicle. This ID light bar has 3 separate mini lights with red lenses mounted on a white steel base that meet the spacing requirements to conform with FMVSS108 for ID lighting. The single wire design grounds through the light bar for an easy installation. It provides a snap-on, scratch resistant lens that is easy to use. The clearance lights feature durable plastic corrosion-resistant housing with built-in drain holes to withstand extreme weather. For the safest towing, ensure all electrical functions are properly operating before hitting the road.