A bunch of cheap ray bans light waves have a certain amount of electromagnetic energy. Wave size is wavelength measured. The visible wavelength range 400-700 nm. Light wave energy and inversely proportional to wavelength, the shorter the wavelength, the higher the energy. Purple energy in the visible red light energy minimization with ray ban sale, while the top of the visible light spectrum is ultraviolet. In fact, natural light contains large amounts of ultraviolet. Due to the high energy of ultraviolet rays, ultraviolet rays can damage your cornea and retina.

What is glare?

The unit of measure of the brightness or intensity of light lumens of ray ban sunglasses. For example, indoors, most artificial light intensity of 400-600 lumens.