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http://www.ledbenchmark.com/faq/life-expectancy.html#:~:text=According%20to%20the%20claims%20from%20various%20manufacturers%20LED,bulbs%20and%205%20times%20longer%20than%20compact%20fluorescents.
https://insights.regencylighting.com/understanding-led-lifespan-how-long-do-led-lamps-and-fixtures-actually-last
"Rated lumen-maintenance life is measured in hours with associated percentage of light output, noted as Lp. In other words, L70 of 30,000 hours means that the tested LEDs produce 70% of the initial light output at 30,000 hours. If an LED has L50 of 30,000 …
https://www.electronics-notes.com/articles/electronic_components/diode/light-emitting-diode-led-lifetime-lifespan-expectancy-mtbf.php
However for non-critical areas the L50 figure may also be used. As a rough guide, most LEDs intended for lighting applications offer L70 values of 50,000 to 60,000 hours, although with improved manufacture of the high brightness LEDs used for lighting, some manufacturers are now …
http://www.ledbenchmark.com/faq/life-expectancy.html
According to the claims from various manufacturers LED lighting has a life expectancy of 20,000 to 50,000 hours. At 8 hours per day this would be approximately 17 years. This is roughly 30 times longer than incandescent bulbs and 5 times longer than compact fluorescents. This estimate from the manufacturers is in fact more of a guess-estimate based on accelerated wear testing, which isn't a …
https://www.fagerhult.com/globalassets/global/downloads/technical_info/life_time_leds_download.pdf
Declaring the life time of LED-luminaires in the U.S. and is globally accepted. The LED suppliers test their LEDs over a minimum of 6.000 h and measure the lu-men drop every 1.000 h. These values are put into the TM-21 system and the expected life time can be extrapolated. Note: Fagerhult will not officially publish a time longer than 100.000 h.
https://eepower.com/technical-articles/understanding-power-led-lifetime-ratings/
The combination of such factors can result in significant differences in LED lifetime. Typical lifetimes are from 30,000 hours to 100,000 hours, so a real test of LEDs for such long times is not possible to manufacturers, it would take years of testing.
https://www.fagerhult.com/knowledge-hub/LED/Life-time-/
Fixed hours for L-values follow the most typical applications, 35,000 h, 50,000 h, 75,000 h and 100,000 h. All L-values will relate to the median (i.e. the former B50), which however, is not specified. Times longer than 100,000 h will be avoided.
https://www.accessfixtures.com/led-lifetime-l70/
For this reason, it is not uncommon to see LEDs with L70 rated lifetimes of 50,000 hours, 100,000 hours, 200,000 hours, or greater. For example, let’s imagine an LED bollard light that produces 2,100 lumens and is said to have an L70 rated life of 50,000 hours.
https://hackaday.com/2019/02/05/what-happened-to-the-100000-hour-led-bulbs/
Early adopters of LED lighting will remember 50,000 hour or even 100,000 hour lifetime ratings printed on the box.
https://www.lrc.rpi.edu/programs/nlpip/lightinganswers/led/life.asp
The lighting industry presently does not have a standard definition for LED lamp life (Narendren et al. 2001a). The lamp life definition for traditional light sources is the time at which 50% of the test samples have burned out (Rea 2000). LEDs generally do not fail by burning out but will slowly reduce in light output over time; as solid state devices they will continue to operate even after 100,000 hours, continuing to …
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