The blue LED light and design of this product is intended to support good oral health and help maintain whitened results when used with an effective whitening toothpaste. It is best to ask a dental professional for product recommendations such as whitening toothpastes and other dental products. Results may vary when using any type of teeth whitening and/or oral care product based on individual use, lifestyle, and dental history. Be sure to follow the exact directions for correct usage and an optimal experience as products can vary.