title_body: Are brown bottles sufficient to protect beer from skunking?
upvoted_answer: Certain wavelengths of light are responsible for skunking beer. I believe these are mostly in the blue and ultraviolet parts of the spectrum. Brown bottles do the best at blocking out the UV rays. This is why you can get an occasional Rolling Rock that tastes off. I've never heard of a UV reflective coating before, but it makes sense.
  
  What follows is probably only relevant if you want to be nit-picky about this:
  
  If it is not in direct sunlight, I'd say your pretty ok. I don't know what your lighting situation is, but I know most incandescent bulbs mostly give off infrared light (I'm not sure if infrared light has been correlated to skunking) and the modern CFL bulbs mostly give off light in the visible spectrum. I'd say both however give off some sort of UV light.
  
  If you are really concerned, you could tint the cupboard glass. Vehicle window tint is designed to block out UV rays that can damage the interior of cars. Your level of protection depends on how dark you want your tint. If you want the highest protection though, I'd recommend a wooden cupboard.