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) lighting and a CRI of 99, enhancing color vibrancy of objects. May generate heat during operation due to halogen bulb characteristics. Dimmable R7S halogen bulb for R7S base type. Compatible with dimmer switches to adjust brightness. Flicker-free operation. Free of hazardous emissions, UV, and IR radiation. (Note: The 400W R7S floodlight bulb may appear less bright at long distances compared to other floodlights of the same 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. One-year warranty. 90-day hassle-free return or replacement policy. For support, contact seller through Amazon messaging.