Helmet mounted lights are excellent for illuminating your hands when tying off/whatever; just doesn't need to be bright.
For a light failure, reach to my head and turn one of the backups on. Can pull them off the helmet if necessary. No furkling around in pockets required.
For a light failure, reach to my head and turn one of the backups on. Can pull them off the helmet if necessary. No furkling around in pockets required.