Expires October 31, 2019. Complimentary with paid first exam & x-rays. The Philips NiteWhite Whitening Kit is the best professional home whitening system. The kit comes with a custom-fit mouth tray and set of bleaching gels. You wear the trays at night while you sleep and wake up to a brighter smile. Must mention offer when scheduling to claim. New patients only. Cannot be combined with other offers.