Max output is rarely a concern, it’s the lowest mode that matters.
You’d be surprised how little light you need - my headlamp is programmed to have max output of 10 lumens! :smiley: The night sky is much more enjoyable if you avoid blasting your lights at max. Also, turn down the screen brightness on your camera.

Why do you want both a flashlight and a headlamp? If you’re photographing, a flashlight will probably stay in your pocket.

Like others already said, you’ll find what you need on nkon.nl website.

Get a headlamp that has a good moonlight/firefly mode; preferably close to 1 lumen.

I suggest Zebralight H600w (lithium battery for longer runtime) or H53w (AA).