You only need about 300 lumens for riding in pitch black. The higher lumen rating really doesn't make a huge difference in visibility but does make a difference in battery run time.
I prefer Cygolite brands because they have a better beam pattern than other brands. Nice to have something that lights up the width of the trail. I have no experience with the Trek store brand lights. If they don't have some type of diffuser and instead focus into more of a straight ahead beam, than you will need more lumens to get the peripheral lighting needed. You really don't need to see 1000 yards down the trail at bicycle speeds.
The suggestion to always carry two lights is an excellent one. I typically ride before the sun comes up. If a light goes out I am stuck waiting for the sunrise.
Last edited by Pop N Wood; 08-01-20 at 11:26 AM.