Whitening Lightning is the premier teeth whitening product provider. It is the easiest and most effective way to brighten your smile. All you have to do is apply the Whitening Lightening Pen before you go to sleep. Just paint it on your teeth, let it dry for a minute, and that's it. It will whiten your teeth and fight stains while you sleep! If you use the Whitening Lightening Pen every night for 2 weeks, your teeth will be up to 7 to 10 shades brighter and whiter.