With the adjustable beam you can shine it ahead as far as you want.
Big difference in High and Low.

Bright run time about is 90 minutes, guessing battery quality effects it the most.
My other Cree 5's are bright for 3 hours. Have not tested this one.
It should also have a 3 hour bright period.
I have cheap ones, but getting some good ones soon.
I use it for a Day Time Strobe Safety light.