Revamped testbed

Adherence to flash threshold (flash-threshold)

Flashing content does not exceed the general flash threshold (i.e., no flashes with an intensity greater than 3 Hz and less than 55 Hz).

This test case has flashing lights

Gif exceeds Hz threshold:

This flashing gif has an intensity of ~4hz thus exceeding the general flash threshold:

Video with quickly flashing red and white

Note: Hard to automatically test/detect. A human tester or AI is required to (visually) verify if the flashing content frequency is between approximately 4 Hz and 55 Hz.