Hummm....I never knew that about UV...so I guess my lampshades are at risk anyway!
> Hummm....I never knew that about UV...so I guess my lampshades are at risk anyway!
The reason UV does this is that the distance between carbon atoms in most organic compounds (plastics, cotton, etc.) is the same as the wavelength of the UV. This causes the carbon-to-carbon bond to vibrate and sometimes break. This degrades the material on a molecular level. UV is tough on stuff.