... s practical tester to identify or compare the quality of LED lamps,fluorescent lamps, halogent or incandescent lamps,or appliances ... different lengths,different watt, single part and two parts supplier LED T8 tube.3. Testing parameters: Lux, Color temperature (CCT ... with different converter for E27, E14, B15, B22,MR16, GU10, G9.Could test different bulbs with different bases. LED T8 Tueb tester ...