Eye response to pulsed light

Ive been reasarching in this topic, but ive found contradictory info
about.

I would apreciate very much an explanation about.

Ive read many times that when human eye receive a pulsed light at high
frecuency, it (simplyfing all the perception system) perceives it as a
continous light, with some flickering effect at lower frecuencies. But
sometimes i read perceived brightness correspond to the pulse's
brightness, while other times, ive found eye average out the pulse
brightness over the wlole time pulse on/pulse off.

So my question is what answer is correct, or if both may be correct,
depending of the frecuency used, or the concept perceived (ie,
brightness, luminosity, color discrimination...)

Thanks in advance