I had the JetBeam HC20 as my first headlamp and have to say I wasn’t impressed with it.
The output seemed low for a claimed 800 lumen torch and the reliability was poor, it started to switch off while in use. I took driver out to look for any bad connections (didn’t find any) then after putting back together it now whines loudly in all but full power mode.
I binned it and bought a Nitecore HC30 https://budgetlightforum.com/t/-/36871 which I find is a great headlamp, much brighter than the JetBeam ( Nitecore claim 1000 lumens) and up to now reliable.
I work on HGV (Trucks) and trailers running CCTV cables from front to rear underneath them so a good headlamp is important as somedays it can be on for up to 8-10 hours, the HC30 has 5 modes and level 2 or 3 will last all day while still being bright enough, it is quite a thrower though so if you just want flood without a spot it’s not for you.