50,000 hours average rated lifetime. Last 2.5 times longer than 14W 549mm fluorescent tri-phosphor T5 lamp. High switching cycles – 200,000X. High lumen efficacy. Omni-directional light distribution and wide beam angle. Minimum and maximum operating temperature: -20°C to 50°C. Glass construction and polycarbonate end-caps. Not suitable for direct mains (AC 220-240V) or magnetic/ CCG ballast. Works only with compatible electronic ballasts. Ideal for factories, parking lots, supermarkets, department stores, schools and offices.