It depends on the amount of light. Try reading a book outside on a clear summer day when the sun is at its zenith. Your eyes won't even stand it. It doesn't mat

It depends on the amount of light. Try reading a book outside on a clear summer day when the sun is at its zenith. Your eyes won't even stand it. It doesn't matter that the light comes from a direct source or from reflection. We can easily imagine more extreme experiments using mirrors and spotlights.