The answer is in the fact that Brite Smile teeth whitening system uses an accelerator during the second and/or third teeth whitening application, which enhances greatly the strength of the whitening agent. This accelerator is in the form of a light emitting diode or as it is commonly known the world over, LED, which is also manufactured by the BrightSmile Inc solely for this purpose. This LED is what kick-starts the whitening process through what is known as photo-initiation.
Brite Smile Teeth Whitening