I have two XML T6 flashlights (advertised as 900 lumen, 1x18650 each). Just one on full power seems mighty bright to me.
What I wonder if that because car lights' lenses/reflectors have a much larger surface area than flashlights/bike lights, do they look less annoyingly bright?
I hold that view myself. For example, a 40-watt fluorescent tube might put out about 3000 lumens, but you can look right at it because the light is coming from a large surface. Condense that output into an aperture the size of a bicycle headlight and yeah, now That's Going To Leave A Mark
