sick all the time

[Tom Campitelli]

Yonason, you have to go easy with citing papers, especially multiple papers with limited relevance. It is easy to post those things, but there is a time cost involved in responding. Pick one that best argues your point, and follow up in a limited fashion because, well, time is too limited to read and find the flaws in multiple papers.

[Tom Campitelli]

Tom, the amount of light that reaches the Earth's surface is defined by Beer's law (Exponential attenuation with path length).

Since the path length of sunlight changes by a factor of 7 from noon to sunrise and sunset, the scattering of light increases as the negative fourth power of the wavelength (Rayleighs Law - why the sky is blue, and UV is shorter than blue) and absorption of UV by ozone is crazy high (longer path means more ozone to go through). The difference between noon and sunset = e**-(Huge Number) = zero.

In other words, I won't argue about the correct execution of a proper low bar squat!

No one, including me, suggested you are getting a lot of UVB at sunset.