Specification: Tricolor tube Life span: 8,000 hours Voltage: 220/240V 50/60Hz, 100/130V 50/60Hz Dia.:12, 14, 17mm Power: 12mm:28-36w; 14mm:40-65w; 17mm:65-105w Tube&length:14mm:135-165mm 17mm:175-205mm Luminous Flux:14mm:2100-4225Lm 17mm:4500-6510Lm Color temperature: 2,700K; 6,400K Rendering Index:80 Base: E27, B22, E40 Features: 1) High quality and big power 2) Safe and easy to use 3) Protect eyes 4) Big power is specially used in the project We have a very wide range of "U" energy saving lamp products with different sizes and watts, such as 2U, 3U, 4U, 5U, 6U and 8U. So it is very convenient for you to choose. For the specifications, please contact me soon! And a very favourable price is waiting for you !