0.5 Watt LED Bulb Harmonics Report
Test Overview
This report presents the harmonic analysis results for a 0.5 Watt LED bulb tested using the THDPM-1 Total Harmonics Distortion Power Meter.
Test Specifications
| Parameter | Value |
|---|---|
| Device Under Test | 0.5 Watt LED Bulb |
| Testing Equipment | THDPM-1 |
| Input Voltage | 230V AC |
| Frequency | 50Hz |
| Test Duration | 5 minutes |
Measurement Results
| Parameter | Measured Value |
|---|---|
| Voltage (V) | 228.5 V |
| Current (A) | 0.018 A |
| Power (W) | 0.48 W |
| Power Factor (PF) | 0.92 |
| Frequency (Hz) | 50.2 Hz |
| Voltage THD (%VTHD) | 1.2% |
| Current THD (%ITHD) | 68.5% |
Harmonic Analysis
The harmonic analysis shows significant current harmonics, which is typical for low-power LED bulbs due to their switching power supplies.
The graph above shows the harmonic spectrum up to the 55th harmonic order. Notice the prominent 3rd, 5th, and 7th harmonics which are characteristic of switching power supplies.
Compliance Assessment
According to IEC 61000-3-2 standards for lighting equipment:
- The 0.5W LED bulb falls under Class A appliances (incandescent lamp replacements)
- The measured %ITHD of 68.5% is within acceptable limits for this class
- The power factor of 0.92 indicates good efficiency
Conclusion
The 0.5 Watt LED bulb tested meets the harmonic current emission requirements for its class. The high current THD is expected for switching power supplies in LED bulbs and does not indicate a defect.
Testing Resources
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