1,100%tri-phosphor. 2,high efficiency. 3,Ra>80. 4,long lifetime>8000hrs. 5,color temperature:2700-6400K. 4U electronic cfl lamp tube:(1)Up to 95% energy saving.(2)10 times the lamp life of standard incandescent lamp.(3)Excellent color rendering ,excellent light distribution.(4)Flicker free instant start.(5)Universal burning position. 20W 4U CFL tube