High efficiency R7S halogen bulbs, 400W, 4000 lumens. Voltage: 230V. Length: 4.65" (118mm). Direct replacement for all T3 118mm R7S double-ended sockets. Average lifespan of 2500 hours, reducing the frequency of bulb replacements. (Please measure the size of your lamp base before purchasing. Compatible only with 118mm base, not 78mm.) Excellent performance with high-quality eco-halogen technology. 360-degree wide beam angle. 118mm 400-watt J-type double-ended halogen bulb suitable for R7S base. Clear glass construction delivers 2700K warm white (amber) light and provides a CRI of 99, enhancing color vibrancy of objects. May generate heat during operation, consistent with halogen bulb characteristics. Dimmable R7S halogen bulb for R7S base, 118mm J118 type. Compatible with dimmer switches to adjust brightness. Flicker-free operation helps reduce eye strain. Free from hazardous emissions, UV, and IR radiation. (Note: The 400W R7S floodlight bulb may appear less bright at long distances compared to other types of floodlights with similar wattage.) Wide application: Suitable for home, shop, and office spotlights, task lighting, security lighting, showrooms, stage and studio lighting, floor lamps, and landscape lighting. Designed for reliable performance. If you have any questions, please reach out for support.