The principle of blue light whitening is to use oxidation-reduction reaction to restore the brighter and whiter color of your original teeth.

Blue light whitening is a method used in teeth whitening treatments. It primarily involves applying a teeth whitening gel made from hydrogen peroxide onto the teeth, and then using low-temperature cold light from an LED whitening lamp to promote oxidation-reduction reactions that help restore the teeth to a bright white color. The reason behind naming it blue light whitening is because the light used in this process does not generate heat. However, the light may still affect your eyes therefore while undergoing treatment, a dentist will assist their patient in wearing special protective goggles.