Changes in UVA and UVB levels |
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Time | UVA (%) | UVB (%) | UVC (%) |
Sunrise - 9:00 | 60 | 12,5 | 0 |
9:00 - 11:00 | 90 | 20 | 0 |
11:00 - 13:00 | 95 | 95 | 0 |
13:00 | 100 | 100 | 0 |
13:00 - 15:00 | 95 | 95 | 0 |
15:00 - 17:00 | 90 | 20 | 0 |
17:00 - sunset | 60 | 12,5 | 0 |
*Relative to intensity of UVA and UVB, respectively, at the solar zenith (13:00). |
Reference:
Hawk, J.L.M. McGregor, J. (2000-2005) Understanding your skin: sunlight & skin cancer. Family Doctor Publications.