This appointment will take about 1 hour & 45 minutes - longer than the listed 60 minutes. The actual whitening & remineralization portion, under the blue & red light, will be a total of 60 minutes. The additional time will be for enamel & gum prep! You can lift anywhere from 4-8 shades depending on your initial shade. * all materials used are Safe for the mouth. Completed by a dental / orthodontic clinician