Ushio Compact Fluorescent Coilights are energy efficient, with up to 12,000 hour average lamp life, low operating temperature and features an integral Electronic ballast. E26 medium screw in base operates in a standard Incandescent socket. Made in Germany. Triphospher coating render colors closer to nature and a coloring index of up to 85 in a 2700K warm white color temperature. Not designed for dimming or use in enclosed fixtures without adequate ventilation.