We are testing a 4 Watt LED Bulb at 220 Volts UPS AC input. We are using Embuilt SPEA-1 to test the Bulb properties.
Specifications – 4W, 27mA, 220-240 VoltsAC, 50Hz

When power is on the following results are found –

Here we can see that VTHD is 4% which means UPS Supply has 4% distortion in Voltage. It also effect the wave form of UPS Supply or we can say that Voltage waveform is not 100% sine wave(Ideal condition).

ATHD % is 51.2 which means LED Driver(Internal in LED Bulb) distorted the AMPS waveform by 51.2 %. It also has effect of Voltage THD. 

We can also see the 3rd harmonics of Voltage is 6.329 Volts. 

Here we can see the 3rd harmnonics of voltage in % of first harmonics. 3rd Voltage harmonics is 2.8% of Vrms Harmonics. 

Here we note that ideally first harmonics is to be equal of Vrms and other order harmonics are to 0.

So we need to minimize the harmonics.

Here we can see the 3rd harmonics Value of Amps. It is 8.374mA it has another waveform with Amps(Current) level of 8.374mA.

In the above image 3rd Harmonics of Amps shows in display 6. It is 35.6% of Arms (23.54mA).

Other parameters can also seen on SPEA-1.

You can also view readings on the SPEA-1 Software.

Softare is connected to SPEA-1 for real time data viewing and reporting.

Above is the voltage harmonics spectrum of 4 Watt LED Bulb. All values are given in % of Vrms.

Above is the Amps(Current) harmonics spectrum of 4 Watt LED Bulb. All values are given in % of Arms.

Harmonics report is also generated for 4W led bulb which contains the parameter valuews with Harmonics spectrum.

Click here to download the harmonics report of 4W LED Bulb.