This Spectrum analyzers is very helpful for testing CFL & LED lamps.It could connect with the computer and export the test ... temperature ect.This Spectrum analyzers is very helpful for testing CFL & LED lamps.It could connect with the computer and ... , efficiency. Voltage, Wattage, Current,Power factor, Annual power consumptionEquiped with different converter for E27, E14, B15, B22, GU10, G9.Could ...