Did you know that you can have a white smile with up to 8 shades in just 16 minutes a day? Not only that, but professional teeth whitening procedures are also needle-free and do not require the use of a dental drill. Instead, the process is as simple as placing the bleach, applying an LED light and letting it work. Modern technology has actually made it possible for you to have a whiter and brighter smile quickly and easily. And, yes, light does play a role in the accelerated whitening process. However, the simple smile of an LED light will not whiten your teeth. To understand how LED lights play a role in the whitening process, you must first understand the basics of how teeth whitening works.