... ,watt,current,power factor,and annual power consumption for LED T8 tube tester,also CFL tubes bulbs and ... and bad quality of lighting products(esp.LED T8 tube ,fluorescent tube.) LED T8 Tueb tester Measures:1. It ... to identify or compare the quality of LED lamps,fluorescent lamps, halogent or incandescent lamps,or appliances ... 1 year replacement warranty. Lux Meter for LED T8 Tube,fluorescent tube.