I have the Dinotte XML-3. It's been independently measured at 2000 lumens. It runs 100% (2000 lumens) 50% (1000 lumens) or 25% (500 lumens).
It's a fairly wide beam, originally designed for mountain biking.
I do aim it downward, so the main pool of light on the road is about 25-50 feet ahead. But part of the beam is above level.
I run it at 2000 lumens in the city, to compete with car headlights, and alternating bright and dim areas. Even though the beam is pretty wide, I've never had a car flash it's brights at me, or otherwise react. Even 2000 lumens appears to be about half of a car headlight.
The 2000 is way too bright on dark country roads after my eyes adapt -- the reflective street signs are extremely bright. I'll only go 2000 on faster downhills.
Last edited by rm -rf; 06-12-18 at 07:48 PM.