S25 3 Watt LED. Very Bright output up to 300 lumens, comparable to a 25 watt incandescent bulb. concave lens for good light distribution. Great for automotive use in tail lights, RV interior and exterior lighting, and boat interior lighting. Please make sure to measure your current bulb to ensure this will fit in your receptacle. Great metal heat sink for long life rated up to 30,000 hours. Available in White (6000K), Warm White (3000K), Red(625nm), Green(526nm), Blue(464nm),& Yellow(594nm).