I experience the same "blinding bright but visually dark" on a battery powered light I own. I wonder if it depends on the length of time the light is off. Most

I experience the same "blinding bright but visually dark" on a battery powered light I own. I wonder if it depends on the length of time the light is off. Most light that flicker below 400hz really bother me, but I still perceive the surrounding as illuminated. While this particular torch light feels like "blinding darkness".