I've used this version of the same light for a year as a helmet light. Mostly as a to-be-seen light on flashing mode, but occasionally as a supplemental trail light on the unlighted tree-covered sections of the MUP, including last night. Weighs almost nothing. Lights where I look. Also handy for nighttime roadside maintenance and repairs.

The beam is a little irregular but the sorta-trapezoidal pattern works best from helmet height, where the brighter upper part of the pattern is farther away so it evens out with the lower, less bright part of the beam. Much cheaper than the Light and Motion helmet light, much smaller and lighter than the various Chinese lights with external battery packs (and I always worry about the battery packs on those things).