Teeth Whitening Brighten your smile in just 30 minutes. Teeth whitening with blue light therapy. The tech will apply a whitening gel to your teeth. Then they will use a blue LED light, which activates the hydrogen peroxide or carbamide peroxide whitening gel. This helps break apart the gel faster. The resulting chemical reaction lifts stains off your teeth. $250 - 1 session $550 - 3 sessions