Have you already made test #2? - The sunshine-test?
The test "My Individual Need For Sunshine" tells you how many minutes of daily sunlight is good for you. That is your individual Sun-Unit or SU. What was the recommended dose? How long was your individual Sun-Unit (SU)?
Beware that geographical latitude, month and skin-type has a changing influence on the result! We recommend to repeat this test from time to time.