For a front light where you really need power, I'm not going to waste (or 'invest') money on bike-specific lights. Regular CREE LED flashlights are amazing values.

My headlight, which is something like this, attached to my handlebars with hose clamps. It's bright like the sun, I can see where I'm going in total darkness, and it's dirt-cheap. I had previously bought a similar, larger light, but that required two 18650 batteries and this smaller one only needs one (so now I always have a backup ready to go), and being smaller it's more stable. It has a zoomable head so I can get the light on the ground where it's useful, not up bouncing off street signs or other peoples' eyesballs.