No, no, no....
Am likely heading into a world of trouble here but please,.... no headlamps...PLEASE !!
I'm pushing 70, wear specs and hearing aids, have walked the CF 8 times; spring, summer and fall, love to get up before sunrise and walk under the moon and stars and have NEVER needed a headlamp and, perhaps more importantly in the context of the OP's concerns, become lost, taken a wrong turn, stumbled or fallen as a result.
Like most people, my pupils dilate as they should and absorb adequate and sufficient ambient light, the same light that reveals the Way beneath my feet and the route ahead. On those few occasions when a crucial waypoint appears in the shadows, my cellphone torch is always there to shine a light.
In an Albergue, panning around a dorm with a bright headlamp at 5 in the morning, assembling the contents of a backpack that should have been prepared the night before is, in my view, as unwelcome as it is intrusive, inconsiderate and arguably selfish. Again, a cellphone torch, carefully cupped in your hand to absorb and diffuse the glare, is all you need to find those wayward socks under your bunk.
Outside, take a few moments and allow your eyes to adjust - trust yourself and take solace in the fact that for many centuries pilgrims have trodden the same paths without LED beacons or Google Maps. They have navigated the same diverse, undulating and at times confusing terrain with nothing more than their natural senses, human instinct, commitment, submission and trust in that so-very-oft-proven-maxim that 'The Camino Will Provide'.
It is perhaps unreasonable to expect these days that a pilgrim should 'take nothing but photographs and leave nothing but footprints' in their wake....we all leave behind some form of mess or another for the locals to tidy up and dispose of - butere let's not make environmentally damaging Lithium batteries one of them - hey ?