Changes

* On full brightness the beam is brighter than I need (700 lm), so I typically run with it a notch or 2 down. I often run with the light belt at a relatively low intensity, especially just before dawn as it balances the rising light levels and is strangely less claustrophobic.

* The light is perfectly smooth and even, and being a waist mounted, shows the shape of the trail and any obstacles so much better than a head mounted light. (I have the "silver lens" version that has the smooth beam pattern. There is a "reflective mirrored" option that has a more focused beam pattern, but I'd recommend the even illumination as a priority.)

* You don't blind other runners as you turn to look at them, and it's easy to tilt the light so that you can see the ground ahead without shining into people coming towards you.

* The Light Belt comes with the 18650 Lithium Ion 3400 mAh rechargeable battery. These batteries are expensive, so expect to pay over $20 for a genuine one, and watch out for fakes. That said, these batteries are expensive for a reason, having excellent power density and life. Being rechargeable, you can carry spare batteries if you're running all night and need full brightness. (The light works as a recharger for the battery, as the battery itself has overcharge protection. Just plug the micro USB cable into the light.)

* There is no flashing light at the back. I simply purchased some cheap clip-on flashing safety lights which are cheap and effective.

* You can't use a waist mounted light to look at your watch, though most running watches have a backlight. It's also harder to use a waist mounted light to rummage through a drop bag, though I found I can hoist the Light Built up around my chest and pointed down and it works pretty well.

=Black Diamond Sprinter=

The Sprinter is my top pick for head mounted lights, available at <jfs id="B01LE9ZA28" nonl="true" noreferb="true"/>.