Amber or red lights functions as clearance, side marker or identification light and may be used as combination side marker and clearance light when properly mounted. Blue and green lights are for accessory use only, not for use as legally-required clearance or marker light. Features durable base with external mounting holes. Lens snap-locks onto base. Running-board light kit contains six lights, mounting hardware, connectors and easy-to-follow instructions. "24" denotes 24-volt version. Includes single lead wire and grounds through mounting screw.