... LED Office Table Lamp with 60LEDs fixed on a PCB as tube, alumunuim heat sink, 3.6 watts, Lux: 420LM, lifetime:30 ... no heat radiation. The lifetime of LEDs are up to 30,000 hours, which is equivalent to use 10 years when ... flicker,no discover by eyesLighting Age (1000 hours)<10%>30%>30%>10%>30%Lifetime>30,000hr<1,000hr8,000~4,000hr10,000~8,000hr8 ...