90% of my coworkers in aircraft maintenance are running zebra lights, and we use them everyday. 18650 rechargeable is very bright. Run time of probably 8ish hours at full brightness if I had to guess. Hardly ever use that brightness setting as it’s blinding when working within an arms length away. I prefer the AA zebra, so small and light it’s almost unnoticeable when wearing. Coast has some good cheaper headlamps as well the model that can focus the beam is the one I preferred, Ive had 5 of em. Probably went through one every 6-8 months. Than bought my zebra a couple years ago. It’s been dropped, soaked in oil/hydraulic fluid, and abused daily. The headband stretched out and became too loose a couple weeks back, got a new one for less than $10. I won’t buy another brand. I’d advise you to steer away from a headlamp with plastic parts regardless of which you decide on.