Bindi is a good shout as runtime is perfect for what you need and it’s REALLY light for the weight
I’ve used a Bindi off road and unless it’s very smooth, ime it’s not really bright enough. Good back-up torch to stick in a bum-bag though and fine on smooth stuff like converted railroad trails. I get that ‘enough’ is subjective and depend on you, the terrain you’re on and how fast you want to go.
The Swift RL’s decent. Ime the reactive lighting works really well and, if you don’t like it, you can just stick it on constant. The beam pattern’s floody enough to work pretty well for proprioception too. My take is that you want a big, floody beam otherwise your brain doesn’t have a wider visual context for reference and you feel off balance.
If you can find one cheap, the Petzl Nao+ is brilliant. Not outright much brighter – it might even be less – than the Swift RL, but separate battery box means it’s more balanced on the head and the beam pattern is just a huge pool of light. Great on proper off-road.
Also, a tad left field, but surprisingly good, is the Petzl IKO Core:
https://www.petzl.com/GB/en/Sport/PERFORMANCE-headlamps/IKO-CORE
Very, very light. Much brighter than the Bindi. Very comfortable and stable. Mad looks. Doesn’t have much of a spot beam, but doesn’t really need one for running unless you’re trying to pick out gates in the distance or something.
Finally, Silva does some decent running torches with a mixed flood and spot beam that are also worth looking at. They’ve just launched a range of new off-road running torches that might be worth a look. I’ve not used one, but looks like similar technology / beam patterns to their older stuff:
https://silva.se/trailrunnerfree/