2011 High Pressure Sodium Lamp 1,Long life span:10000h; 2,High luminous efficacy; ... Rendering;3,Compact structure, make the lamps and lanterns of miniaturization.Part No.PowerLumenDiameterLengthBase typeZY55-0150W4000lm55mm135mmE39/E27ZY55-0270W5000lm55mm135mmE39/E27ZY55-03100W9000lm55mm135mmE39 ... Life time:40,000-50,000 hours 6) Full range of colors: cool white(6000-6500K), warm white(3000-3500K), ...