bull$hit!
as usual, nitecore FAKES their runtime graphs. same thing happened w/ their HC50. fabricated graphs that aren’t even close to resembling their actual performance.
they have to stop doing this or they’ll lose their credibility 
I love the HC90. It is too floody for my taste, but I knew it would be that way because of the shallow reflector. The slider is poorly made and controlling precise brightness levels is not great, but it works. The build quality besides the slider is excellent as one would expect from nitecore. Highly recommended.
Could you recommend lights that have a similar control slider, but are cheaper?
Maybe someone knows some but I can’t recall any budget slider-controlled lights.