You will only need 15 minutes for the White Light Smile. Most companies require you to do a number of steps to prepare your teeth for the whitening. Exoslim There are dental trays, ointment, gels, and other cleaning that you must do to your teeth with their systems. However, White Light Smile is incredibly unique.Instead of wasting time to prepare your teeth for the treatment, you just turn on the device and shine it on your teeth as the instructions detail with the set. Whitening begins relatively quickly, but you should allow the device to work for the full 15 minutes to get the right level of whiteness. http://drozforskolin.org/exoslim-reviews/