Features: Energy-saving and environment-friendly Base Type: E27/E26 Input voltage: 85 to 265V AC Power: 4W Beam Angle: 360° Luminous flux: 270lm-310lm (Warm White: 2,900 to 3,500K /White: 6,000 to 7,000K) LED Type: SMD LED working temperature: less than 62 degree Celsius Temperature: -40 ~ 70 degree Celsius Brightness degradation: 3% - 5%1kh Lifespan: 50,000 hours No UV or IR radiation Application: Replacement bulbs for general lighting, especially for museums, art galleries, cosmetic counters where UV or IR radiation is undesirable