How can the exposure dose jump from 100 J/m2 to 625 J/m2 from the first to the second exposure?

A16 To better clarify the intention of this proposed approach, it is suggested that, after a first exposure of not more than 100 J/m2, a non-tanned individual may gradually expose himself to higher doses. The highest dose may never exceed 625 J/m2. This should allow the maintenance of the desired tan.

This regimen approximates the recommended exposure schedule that is presently enforced by the Food and Drug Administration (FDA) in the US. More.

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