I have an over 1000lm helmet and an over 1000lm handlebar flashlight. They are adequate, but I never see myself running them at under 100%. Exception is if darkness surprises me far from home and I need to preserve battery. They only get an hour on 100%.
They are 2 years old, so if I needed to buy new now I'd hope to get at least 1,500lm.
I also would investigate larger than 18650 battery options for better run time.