If you want lumens, the bricks are better. My headlight is 3200 lumens and it's a dinotte lighting XML-6. Even at the half power setting, 1600 lumens is pretty nice. It allows me to see and avoid road issues, debris, and critters before I hit them.
If I were restricted to 250 or 350 lumens, I probably wouldn't ride at night. But then, I do most of my night riding in areas that lack street lighting. I depend on my lighting system for all my illumination.