Name: Headlamps: What Matters, and What the Box Won't Tell You
Brand: YKS

Headlamps: What Matters, and What the Box Won't Tell You

The one piece of kit where a bad choice ruins a morning. What to look for, what to ignore, and why the lumen number on the box is the least useful part.

Of everything in the pack, this is the item where buying badly is felt immediately.

The wrong headlamp announces you across a field, blinds the person you are walking with, and dies twenty minutes into the walk out. The right one you will forget you are wearing, which is the entire specification.

Red first, not red eventually

The single feature worth choosing on. Your eyes take twenty to thirty minutes to adapt to the dark and about a second of white light to lose it. A lamp that starts in red every time protects that automatically; a lamp where red is three clicks deep into a menu means you will flash yourself white at 5am while trying to find it, every time, forever.

The number that actually matters

Not peak lumens — runtime at a level you would actually walk by. Most lamps quote a headline brightness they sustain for a few minutes before stepping down to protect the emitter. Look for hours at mid output, and treat the big number as marketing.

Lockout and batteries

A lockout stops the button being pressed inside your pack, which is how most lamps arrive flat. And prefer a lamp that takes a swappable cell as well as charging over USB: rechargeable-only is fine until it is cold, half charged, and there is no way to hand it a fresh battery.

When not to buy one

If the lamp you own already starts in red and holds a charge, you are done — this is not an upgrade worth making. The failure mode with lighting is almost never “not bright enough”. It is “flat”, “blinding”, or “at home on the bench”.

What you get

A red mode that comes on FIRST, before the white beam wrecks your night vision
Runtime at a usable brightness, not the headline lumens number
A lockout, so it does not empty its battery inside your pack
Rechargeable with a spare cell — not rechargeable with no way to swap

Questions

Almost never, past a point. Peak lumens are quoted in a burst mode most lamps hold for a couple of minutes before stepping down, and a bright white beam destroys the night vision you need for the next half hour. Runtime at a moderate setting is the number that changes your morning; the one on the front of the box is the one that sells it.

It is an affiliate link: if you buy after clicking through, we earn a small commission at no extra cost to you. It does not change the advice — and the advice here is that if your current lamp has a working red mode and holds a charge, you should keep it and spend the money on something else.