This red LED marker light is a direct replacement for the classic 99 incandescent trailer light (commonly known as #225). Designed for cargo trailers, utility trailers, RVs, and truck bodies, it features two high‑power LEDs that deliver bright, consistent red illumination while drawing significantly less power than traditional bulbs. The light mounts using a 3" center‑to‑center bolt pattern, matching the standard 99 footprint for a hassle‑free upgrade. LED technology provides a much longer lifespan, reduced maintenance, and better vibration resistance – ideal for harsh trailer environments. Replace your old, dim, or burnt‑out marker lights with this modern, energy‑efficient LED version. Single light unit; mounting hardware not included.