Teeth whitening with the Beaming White Advanced Teeth Whitening System takes four, 15 minute treatments, so the approximate time is an hour plus a few minutes between the treatments under the blue light, when we remove and reapply the peroxide gel. The cost is $100 and it is recommended to buy the maintenance kit with carbamide brush pen and boil and bite mouth tray for $25 for a total cost of $125. The effects are fast and dramatic, and the best part is that it is safe and pain-free. Sometimes Everlasting Beauty offers huge discounts on this service just so I can move inventory long before it’s expiration date. Each kit has to be used within a certain time frame so the potency of the peroxide, which is kept refrigerated, doesn’t degrade.