Sylvania ToLEDo Superia Cool White is a energy efficient LED T5 4ft tube, which is built to last and has many general applications. This comes in a pack of 10. - 50,000 hours average rated lifetime - Last 2.5 times longer than 54W 1149mm fluorescent tri-phosphor T5 lamp - High switching cycles - 200,000X - Omni-directional light distribution and wide beam angle - Minimum and maximum operating temperature: -20°C to 50°C - Glass construction and polycarbonate end-covers - Only suitable for direct mains (AC 220-240V) operation - Ideal for factories, parking lots, supermarkets, department stores, schools and offices - Not suitable for operation with electronic/ECG or magnetic/CCG ballasts