When you visit the Chelsea dental office of Dr. Kevin Lehman and Dr. Daniel Butensky your smile is their top priority. The entire team is dedicated to providing you with the personalized, quality dental care that you deserve. This certificate is good for a one-hour Brite Smile teeth whitening session. The revolutionary technology is clinically proven to get your teeth their whitest. Over 800,000 happy clients worldwide agree. Here's how BriteSmile Works 1. BriteSmile whitening gel is carefully applied to your teeth. 2. The gel is then activated by BriteSmile's patented gentle blue light for 20 minutes while you relax and watch TV or listen to music. 3. This process is repeated twice more before you go home with a naturally brilliant new smile (and your personal "Before & After" photos).