Running After Dark: A Practical Guide to Trail Visibility
Night trail running solves two different problems, not one, and treating them as the same thing is where most people under-prepare. You need to see the trail in front of you, and you need other people, cars or trail users to see you. Solve for both, separately.
Seeing the trail
A general-purpose headlamp around 200 lumens is fine for a well-marked path, but technical singletrack with roots and rock needs more, closer to 500 lumens so you can actually judge footing at speed. Bring spare batteries on anything longer than an hour, since cold and long burn times both drain a headlamp faster than expected.
Being seen from the front and side
Reflective material only works by bouncing back light that's already hitting it, so it's most effective against headlights and other people's headlamps and does very little in complete darkness on its own. That's why the two work best together: reflective elements for when light hits you, an active light source for when it doesn't.
The angle people forget
Most night-running setups are aimed forward. A small rear light, even a simple flashing red one clipped to a pack or waistband, is what makes you visible to whatever's approaching from behind, whether that's a mountain biker or a car near a road crossing. It's cheap, small, and the single most skipped piece of the setup.
Where reflective hardware actually helps
Reflective details built into the gear itself, not just a vest you put on top, mean one less thing to remember before a dawn or dusk run. The LECAMO ROOT18 carries reflective attachment points as part of the pack, which is worth factoring in if low-light running is a regular part of your routine rather than a rare exception.