RGB test is intended for testing anti-blue light glasses with amber/red-tinted lenses only. It will not work on clear (or almost clear) anti-blue light glasses. Amber or red-tinted anti-blue light glasses are best used before bedtime. You don't want to wear them during the day because of the color distortion and the fact that they block ALL blue light. Not all blue light is harmful. Our body needs some blue light exposure to boost alertness and elevate mood. Our glasses reduce the amount of blue light that reaches the eye without causing too much color distortion.