Our before and after teeth whitening photos show great results using our LED blue light treatment. It is important to set the expectations of teeth whitening. Not all customers will have pearly white teeth in just one session, however, it WILL make them whiter. How much onhealthy whiter? It really depends on a multitude of factors. Factors such as how stained the teeth are prior to whitening, what kind of staining agent caused the stains, and how much a person’s enamel reacts to the peroxide gel and the concentration of the gel.