Headlamp Buyer'S Guide:
Why Most Recommendations Are Wrong 

Ask which headlamp to buy in any trail running group and you'll get the same answer: whatever the person replying happens to own. They love it. It's perfect. They've never compared it to anything else.

There's a reason for it. We all view our own purchases more positively after the fact. Someone saying their headlamp is perfect while admitting they need a Buff underneath it for comfort hasn't noticed the contradiction. So, before you buy, here's what to actually look for.

Key Considerations

The biggest mistake people make is buying cheap or getting a hyped model without thorough consideration and upgrading later. I've gone through more torches than I'd like to admit doing exactly that. If you're going to use this guide, use it to buy the right thing once.

Compare sustained illumination, not peak The popular Fenix HM65R-T V2.0 is a good example. You might expect 400 lumens for 12 hours, but it only holds that for about 30 minutes before dropping to 160 lumens for the rest of the burn. Battery life and heat throttle high output fast, and most brands don't advertise that.

Fixed illumination mode Some lamps have a mode that holds a set output until the battery is nearly empty -- if it says 300 lumens, it stays at 300 lumens. That matters at 3am when you can't tell if your light is fading or the trail just got harder to read. Ledlenser and Lucifer Lights offer this in some models; most brands don't.

Twin lamps A spot and flood running together give you wider coverage than either alone, you're lighting what you're looking at and the ground around it. On technical terrain that peripheral vision matters.

Top strap for stability A top strap makes a real difference when you're running, it stops the lamp bouncing and shifting on technical terrain. Yes, it occasionally tangles in your pack, but the stability is worth it. Ignore this if your hairstyle won't allow it.

Avoid BOA systems for headstraps BOA works well on shoes but it's wrong for a headlamp. The wire tension is uncomfortable compared to elastic, and you end up winding it in and out every time you use it. A good elastic strap should feel like a baseball hat. You adjust it once, then just stretch it on and off.

Replaceable 18650 batteries Choose a lamp with a replaceable 18650 rather than an integrated rechargeable battery. You can carry spares for long efforts, and when the battery eventually degrades you just replace it rather than the whole lamp.

Avoid proprietary batteries Some lamps take removable batteries but only their own branded ones. You're locked into buying expensive replacements, and as models change those batteries often get discontinued. Stick with standard 18650s.

Separate battery and lamp setup A battery pack on the back of your head is more comfortable and balanced than a single front-heavy unit. The cord adds a little weight overall, but 90g front and 90g back beats 140g hanging off your forehead.

Waist and head combo Run both a waist light and a headlamp together. The waist light keeps the ground lit while you move your head naturally to look around. If you're running all night this isn't optional, a stiff neck from hours of looking down will grow increasingly annoying.

Power bank compatibility Rare and not essential, but a nice bonus. If your lamp can run off a power bank you've got another way to maintain high lumens through a long night without swapping batteries.

My Personal Kit: What Actually Made the Cut?

For most races I use the Lucifer Lights S2X. It's lighter and holds consistent output without any of the dimming surprises. I only step up to the L+ for technical or off-trail runs with heavy vegetation, where I run the battery pack in my vest to keep weight off my head and get a genuine 850 lumens for 10 hours.

For my waist light I use the Ultraspire Lumen 850, but I skip the standard belt because it bounces. Instead I clip it directly into the waistband of my T8 Commandos. Much more secure and keeps the beam steady.

For mandatory gear requirements or short efforts I carry the Petzl Bindi or Nitecore NU25 as backups. Light, USB rechargeable, and they don't take up much space.

Everything else, including several popular Petzl and Fenix models, didn't make it. If a light can't hold its advertised brightness through a night shift, it's not in my kit.