UV radiation include sUV-A, the least dangerous form of UV radiation, with a wavelength range between 315nm to 400nm, UV-Bwith a wavelength range between 280nm to 315nm, and UV-Cwhich is the most dangerous between 100nm to 280nm. UV-C is unable to reach Earth’s surface due to stratospheric ozone’s ability to absorb it. (Last, 2006)