I found the lume quite short-lived, maybe an hour and it’s gone. The markers at 12-3-6-9 last longer, perhaps 2 hours.
It is quite bright and really mezmerizing to view.
I wish they had a smaller version with the calibre 5.
The strap has a bad design, with the excess strap tucked inside the strap, which make it uncomfortable. I had snipped off the excess strap due to this, and the metal link scrapes against my skin. They should have the excess strap outside the strap, secured by a loop instead.