FOR YOUR SAFETY PLEASE CONFIRM YOU ARE PURCHASING TO CORRECT REPLACEMENT BULB. If you have any questions or need help or guidance please contact us. We would be glad to help.VOLTAGE: Choosing the correct voltage is crucial for the bulb operation. There is a voltage ratio you are able to go up or down from the voltage you need but it is always recommended to use the correct voltage or higher within the allowed ratio. Wattage: Wattage is the amount of energy is used by a lamp or light bulb.You should never use a higher wattage bulb than your application requires because it will damage your equipment or fixture. Energy saving do the maths:Electric consumption of LED 5W LED bulb: 5W × 8Hrs × 365=14.6Kwh; Electric consumption of 50W halogen bulb: 50W× 8Hrs × 365=146Kwh--Comparison result:1 LED bulb = 1/10 halogen bulbsLong lifespanLED spotlight: approx. × 50,000Hrs;Halogen bulb: approx. × 1500Hrs;--Comparison result:1 LED bulb = 33 halogen bulbsSpecification: Base:MR16Wattage: 5WPower: ONLY AC/DC12VLumen: 450LM CRI>80Color temperature: 3000K Warm WhiteDimmable: NonSize: Φ 50 *50mmWhy choose boxlood LED bulb to replace halogen lights bulb? ★ 3000K warm white color temperature, closer to halogen effect. 450lm lumen flux, replace 50W halogen lamp so easy.★ These LED spot light bulbs provide warm white light, which gives great look indoors. A relaxing warm radiance full glow for living rooms, dining rooms and recreation rooms, kitchen, shopping mall.★ Prices are lower than ever to give you unbeatable value. ★ BOXLOOD LED Bulb is a better choice.