In reply to iamaclimber:
I've got one of these for trail running, (the one with the red and black strap,)... look familiar?
www.(enter well known auction site here).co.uk/itm/New-CREE-Q5-300LM-LED-3-Mode-Zoom-Headlight-Torch-Head-Lamp-Flashlight-WST-/390650107471#ht_10161wt_1362