Click on the blue "i" icon on each image to see the effects of light on beer stored in bottles of different colours.

Of course, light reaches the beer inside bottles and glasses. The amount of protection afforded by glass depends on the colour of the glass.

When beer in green or clear glass is exposed to light of the proper wavelength, skunky flavours can develop in a matter of minutes.

Common areas where this is an issue:

• Glass door refrigerator cases with lights
• Overhead lights above beer displays
• Outdoor beer service (clear glasses as well as clear/green bottles in sunlight)