The HP35R, a new heavy-duty headlamp from Fenix uses 2x21700 batteries and runs at 1200 lumens all night
HP35R
https://www.fenixlight.com/product/detail/index.php?id=248
Spot-and-floodlight delivers a max output of 4000 lumens and high CRI floodlight delivers a max output of 1200 lumens. 450 meters extended beam distance for the lighting needs in searching, ...