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LED light bulb temperature cycling testing

Test method:
1) Put 5pcs LED lights in high and low temperature chamber, and this chamber can adjust temperature changing rate.
2) Input the rated voltage to the LED lights;
3) Set temperature range from -10℃ to 50℃, temperature speed rate: more than 1℃ / min, but less than 5℃ / min;
4) Keep the LED lamp both 0.5 hours in high and low temperatures, repeated 8 times.

Test requirements:
 After temperature cycling, LED light bulb can not leakage, power off and other electrical anomalies