Light does not work.
The top question we are always asked is "does light really work to enhance teeth whitening"? Here is the independent research. We'll let you be the judge of that.
UV Light Enhanced Teeth Whitening. Good or Bad?
Clinical evaluation of an in-office whitening system
Effect of Light Activation on Tooth Sensitivity
Clinical Evaluation use of Light-activation Sources
Comparing At-Home and In-Office Tooth Whitening Techniques
Effect of Light Irradiation on Tooth Whitening