If you imagine a whole page or whole screen -- or a whole visual field -- full of text and images, in all kinds of colors, with one bright flashing light somewhere in that field, it illustrates the principle of involuntary attraction of attention that happens with bright flashing lights.

There is another study showing that the brightness of a flashing light matters much more during the daytime than at night. At night there is no need, according to this study, for very bright flashing lights. They suggest having adjustable brightness levels.