A trailer 3-light ID bar serves to enhance visibility, ensure regulatory compliance, and facilitate the identification of a trailer's presence and movements on the road. Featuring a surface mount design and a 2-wire pigtail with a 48-in lead, this light bar is easily installed and compatible with 12V DC systems. The unit's sealed, waterproof housing and lens ensure durability and protection from the elements, while the replaceable A91RB lights with incandescent bulbs provide clear visibility.