... is in low-light level , that can lighting for monitors, when people or car coming, the light ... high light level . 2.having a long lifespan for 80000 hours3.Special temperature compensation chip, can reduce the ... constant current drive, which can extend the LED lifespan;5.The tube has automatic illumination detection device. Only when ... environment humidity 65+20%RH length of the tube 0.6m,0.9m,1.2m,1.5m ...