The SM-9212, SM-9213, and SM-9214 are professional-grade LED upgrades designed to replace dim, yellow factory halogen bulbs with crisp, modern illumination. While the SM-9212 (T10) is a versatile bulb for parking and cabin accents, the SM-9213 (31mm) and SM-9214 (41mm) are specialized Festoon-style bulbs engineered for high-output interior roofing light. Built with high-density LED chips and advanced thermal heat sinks, this series provides a 300% increase in brightness while consuming significantly less power.