I have a 2018 Deep Sea and if I am out in bright sunlight (it's Summer here where I am now) when I come inside it glows brightly for only 10 minutes or so.
The Super bright charge that the lume gets from direct sunlight fades away relatively quickly.
But, at 5 AM in the morning when it is pitch black, I can still read the time very easily as the lume is still glowing strongly in low light conditions.
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