How is an LEDs lifespan determined?

Nearly every LED lamp retailer in the UK simply uses the information supplied by the lamp manufacturer and they generally take the figures from the LED manufacturer; we believe this leads to inaccurate information as the LED is only one component of many in the lamp itself. The power supply uses many more components and if one were to fail the entire lamp would be useless even with a perfectly functional LED. We test all LED products here in the UK both practically and by independent optometric labs using an algorithm which, after 6,000 hours of testing, projects the number of hours remaining before the LED deteriorates 30% from the original luminance output.

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