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Pack of 4 Units Energy Saving. Replace 35W halogen bulb by 3W LED. Save 90% on electricity bill of lighting. Narrow Beam. 36° beam angle Easy Installation. Standard MR11 shape with GU4.0 base. Can be easily fitted to replace regular MR11 halogen bulbs. Extremely long life. Lower maintenance costs by reducing re-lamp frequency Instant full light. The starting time is less than 0.5 s, no need to wait for warming up the bulb. High CRI. CRI is over 80. More vivid and natural light. . No lead or mercury Solid State. Shockproof and vibration proof No Hazardous Emissions. No UV or IR Radiation Input Voltage: 12 V AC/ DC Please note: If your working voltage is 100-240V, and you don't have a power adapter, please search "Lighting EVER 5000062"on Amazon. About LE Lighting EVER, abbreviated to LE, focuses on creating the best lighting experience. Only high end LED and advanced optical design are adopted. Enjoy lighting with LE.