Darkness does not have to mean the end of training. With a good headlamp and a bit of judgement, night running is safe, calm and often nicer than daytime. Here is how to do it.
Night running has its magic – empty paths, quiet, and a completely different feel to a route you know by day. For it to be safe and enjoyable, one thing matters above all: how you light it.
Less than you think. For running on a hard surface 100–200 lumens is enough, for a technical trail with rocks and roots 200–400. Above that, output starts to hurt – strong light raises contrast, the eye adapts to the bright centre, and you see the periphery, where the obstacles are, worse.
The second reason is runtime. Turbo lasts the shortest of all modes, and while running the headlamp is not air-cooled as well as in the manufacturer's test. The HL2 gives up to 1,150 lumens at maximum with a 100 m beam – that is a reserve for a descent or finding a turn-off, not a setting to run for an hour.
The approach is simple. Set the lowest level you can run on without hesitating, and save the stronger one for the places where you really need it.
On a trail you want to see far ahead (spot) and right under your feet (flood). A pure spot beam makes you swing your head and tires you out; a pure flood does not reach into the bends. That is why running headlamps combine the two.
The HL1 has a spot beam, a flood beam and a combination, so you switch to distance on a descent and to width in the woods. The HL2's beam is focused, but the tilting head lets you angle it under your feet – for roads and shorter runs it is the ideal compromise at 136 grams.
A headlamp that bounces with every stride ruins a run more reliably than two hundred lumens less. What matters is the weight at the front and the width of the strap. The HL2's module is 66 × 25 × 31 millimetres with a 650 × 24 mm strap – little mass, so it does not bounce, and you do not have to tighten the strap until it presses.
Three things worth doing before your first night run: set the strap at home and jump on the spot a few times; wear the headlamp under or over a hat rather than on bare hair, because it holds better on fabric; and if you wear a pack or vest, tighten the front so it does not push the strap backwards.
One more advantage of the detachable module: the HL2 comes off the strap and clips on with its magnetic base, so after the run it becomes a lamp for finding your car keys or lighting a tent.
On roads and in traffic, your own visibility is what counts. Reflective elements on your clothing and a blinking light at the back often do more than another hundred lumens ahead. A headlamp shines forward – a car coming up behind you sees nothing of it.
The second thing is consideration. When someone is coming towards you, drop your head or switch to a lower level. A dazzled walker or cyclist is more dangerous than the dark.
And match your pace to your beam. Light as far as you need to react in time – a short beam calls for a slower pace, not the other way round.
Night running is mainly an autumn and winter discipline, so expect what cold does to a battery: in frost the cell delivers less current, the headlamp drops to a lower mode on its own and runtime shortens. It is not a fault. It helps to wear the headlamp under a hat and keep a small backup light in a warm pocket – the FL6 weighs 94 grams, so you will not even notice it.
For rain, look at the ingress rating. The HL2 is IP68, the HL1 IPX6 – both are enough for running in rain; the difference only shows if you fish the lamp out of water and expect it to still work. What those numbers mean we cover in the article on IP ratings.
Night running needs no more kit than daytime, but two things are worth adding. The first is a backup light: a headlamp that dies five kilometres from home turns training into an unpleasant walk. The FL6 weighs 94 grams, runs eighteen hours at 120 lumens in Eco, and you will not feel it in a vest pocket.
The second is a phone, and not only for calls – on an unfamiliar route the map on it is the one thing that tells you where you are when you leave the path. If you run long distances, a light that can also charge things helps: the FL1 has a power-bank function and 8,800 mAh, though it is a light for the car or base camp rather than for running.
And one thing that weighs nothing. Tell someone where you are running and when you will be back.
For your first night runs, pick a route you know by day – your brain fills in what the light misses and you will run more relaxed. When you come to choose a headlamp, have a look at the general buying guide as well; running is only one of several use profiles.
