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> It's not hard to make LEDs that actually last and have high lumen/watt ratio with off the shelf components. Are you sure? It seems to me that most LEDs dim g

> It's not hard to make LEDs that actually last and have high lumen/watt ratio with off the shelf components. Are you sure? It seems to me that most LEDs dim gradually over time. What do you mean by "actually last?" 10 years? 50,000 hours of operation? Less than 90% reduction in lumens on average over the advertised lifespan?

xxs 5y ago
>It seems to me that most LEDs dim gradually over time. Of course, esp. the warm white ones (they got more phosphor). For 50k hours, the LEDs are likely to drop to 70ish% of their original brightness, provided they stay below 50C[0] - lumen maintenance. That would depend on the spec. of the LEDs but it should be a ballpark number. [0]: https://datasheetspdf.com/pdf-file/1404455/BIVAR/SM5730UWDW05/1 https://datasheetspdf.com/pdf-file/1404455/BIVAR/SM5730UWDW0...