Changes in UVA and UVB levels on a typical cloudless summer day*
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.

Advertisement

 

Print this article

Rate this article Poor 1 2 3 4 5 Excellent

JOBS

Operations Manager R20,000-25,000 Per Month Cost To Company Incl Benefits Gauteng - East Rand Financial Accountant: CA(SA) R400,000-500,000 Per Annum Cost To Company Gauteng - Johannesburg Key Account Manager Gauteng Java Developer-CT Western Cape - Cape Town Java Developer-Jozi Gauteng Account Manager R460,000-540,000 Per Annum Cost To Company Plus Benefits Gauteng Account Manager R460,000-540,000 Per Annum Market Related Plus Benefits South Africa Case Manager R210,000-220,000 Per Annum Negotiable Gauteng - Pretoria Find more jobs Register your CV Post a job