I have an alpkit headlamp which look identical to the Brila 580, the review is quite negative about it
this is a bit of a surprise to me, it seems a good lamp, i have used it a lot for winter running on tracks and trails. I have had motorbikes with less powerful lights
my first headlamp was one of those petzl things with the big flat battery, compared to that modern units are akin to witchcraft