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Product life according to EN 14744
The service life of the navigation light depends on the ambient temperature. If the navigation light operates
at +25 °C, for example, a service life of max. 30,000 hours is to be expected. Operating times at higher
ambient temperatures reduce the expected service life correspondingly.
The remaining service life is indicated by flashing signals after a corresponding time.
The following applies after switching on the light:
- - 1 x flashing = 75% remaining service life
- - 2 x flashing = 50% remaining service life
- - 3 x flashing = 25% remaining service life; recommendation: provide replacement !
- - 4 x flashing = End of the life expectancy; the light switches off immediately

https://media1.svb-media.de/media/snr/50...6f313b.pdf