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Lumen maintenance L90/B50 @ 50,000 hours
The quality of the LED SLM portfolio is backed by the claim of L90/B50 @ 50,000 hours. This means that at
50,000 hours of operation at least 50% of the LEDs’ population will emit at least 90% of its original amount of
lumens.
Average rated life is based on engineering data testing and probability analysis. The Fortimo LED SLM modules
are specified to reach L90/B50 for the nominal Keylight specifications.
Example lumen maintenance as a funtion of operating hours for B50 at Tc nominal.
Operating lifetime (hours)
Lumen Maintenance (%)
Keylight test facility
