A study in the February, 2004 Journal of the American Dental Association (JADA) found that: “The application of lights significantly improved the whitening efficacy of some bleach materials.” The same study found that high-temperature lights can be dangerous to the teeth, which is why Beyond’s Cold-Light Technology is the best choice for safely whitening teeth.
“A specific combination of bleach and light that demonstrates good color change and little temperature rise should be selected for in-office tooth bleaching,” the study concluded. Beyond’s advanced filtering technology removes infrared radiation and carefully controls the temperature of the light.

An abstract of the study can be found by checking the JADA archives at the following website: http://www.ada.org/prof/resources/pubs/jada/index.as