... no Lumen drop under 1000 hours. The lumen of single LED nearly reach to 6.5LM, color rendering index is above ... Alloy Thermal slug + PC TubeWorking temperature: -20-50°CQuantity of LED: 122pcsEnvironment humidity: 10%-90%Efficacy: 90LM/WRa-color rendering index ... of traditional daylight: 15-20Wlifspan: 50000hoursDiameter: 600mm x 26 The scope of application LED T8 uses widely in office, factory, hall, ...