SonShineTans,It has to do with the residual time for the burning effect. The burn on the 3rd session was a combination of the 3rd session and the residual stress from the 2nd session. Residual impact decline overtime... 48 hours most gone, about 72 hours all gone... Hard to manage those type 2's especially 2A's. You just were not conservative enought overtime for the customers skin and the impact of your
lamps.