I have a ZL H51, absolutely love that little thing, all the modes, the brightness etc. The only issue I have is that it's a bit "bouncy" when on my head. Also if I tighten it more I'm left with red lines on my forehead . If I'm sitting or still it's no issue, but if running it may become a problem.
Is there a third party headband I can try that's tighter or something like that? I know this is probably because the light is a bit heavier that plastic headlamps.
I have a Silva Ranger Pro as well and it's less superior in every way to the Zebra, but feels better on my head and when running is better (if only it was as bright and had the same runtime).