LED bulb testing methods cover a wide range of aspects aimed at ensuring that the safety, reliability and performance of the bulbs comply with the relevant standards and requirements. The following are some common LED bulb testing methods:

I. Appearance Inspection
Physical damage inspection:
Turn off the power and remove the bulb, conduct a comprehensive visual inspection of the lamp base, wick and shell.
Check for obvious physical damage, such as cracked glass covers, broken wicks or burnt black marks.
Housing and Lampshade Inspection:
Inspect the housing and lampshade for distortion, scratches, wear, paint loss and dirt.
Ensure that the pins are not deformed and that there is no looseness or unusual noise when shaking the lamp.
Second, the electrical parameters test
Power supply voltage test:
Use a multimeter for power supply voltage test to ensure that the output voltage of the power socket or lamp holder is consistent with the operating voltage required by the LED bulb.
Resistance test:
Use the multimeter to adjust the gear to the resistance gear, and then contact the positive and negative poles of the LED bulb respectively.
For a single LED lamp bead, the resistance value should ideally be measured in the range of several hundred ohms to several thousand ohms. If the resistance value is infinity or close to zero, the LED bead may have been damaged.
Input Voltage and Current Measurements:
Use a voltmeter and ammeter to measure the input voltage and current of the LED bulb to ensure that it is operating within the specified range.
Power Factor Test:
Detect the power factor of the LED bulb through the power factor tester, a higher power factor indicates more efficient power utilization.
Third, light parameter testing
Luminous Flux Measurement:
Use an integrating sphere photometer to measure the total light output emitted by the LED bulb in lumens (lm).
Luminous Efficiency Calculation:
Calculate the luminous efficiency by dividing the luminous flux by the input power in lumens per watt (lm/W).
Color Temperature Measurement:
Measurement of the color temperature of a light with the aid of a color thermometer, in Kelvin (K).
Color Rendering Index Measurement:
The ability of a light to reproduce the color of an object is evaluated using a color rendering index tester. The higher the color rendering index, the truer the color reproduction.
Fourth, thermal parameters testing
Working temperature measurement:
Use thermocouples or infrared thermometers to measure the temperature of the LED bulb at work, to ensure that it is in the appropriate operating temperature range, usually should not exceed 60 degrees Celsius.
Heat dissipation performance assessment:
Check whether the heat dissipation system of the LED bulb is good to ensure that the LED chip will not overheat when working in a normal environment.
V. Reliability Test
Aging test:
Observe the performance of LED bulbs by continuously lighting them for a long time. After 24 hours to 48 hours of aging test, check whether there is flickering, uneven brightness or sudden extinction.
Vibration and Shock Test:
Check the structural integrity and performance stability of LED bulbs in vibration and shock environments.
Sixth, safety and environmental protection testing
Grounding continuity test:
Verify that LED bulbs are well grounded to ensure that current is safely conducted to earth in the event of an electrical fault.
Hazardous material testing:
Detect whether the materials used in LED bulbs contain lead, mercury, cadmium, hexavalent chromium and other harmful substances.
To summarize, the testing methods for LED light bulbs cover a wide range of aspects such as appearance, electrical parameters, optical parameters, thermal parameters, reliability, as well as safety and environmental protection. These testing methods help to ensure that the quality, safety and reliability of LED light bulbs comply with relevant standards and requirements. When carrying out testing, professional test equipment and tools should be used and relevant test standards and specifications should be followed.