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    Why has the color appearance of the LEDs changed after a period of use?


    There are several possible reasons why this happens:

     

    • The LEDs are being overrun by the use of an inappropriate driver.
    • The application temperature is different from the operating temperature noted in the LED datasheet.
    • There may be heat build-up due to improper thermal management.
    • The phosphor may have degraded due to overheating or other reasons.

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