Definitions for "Lightstruck"
A condition that can occur in wines (especially delicate wines like Champagne) when they are exposed to ultra-violet light rays for too long a time. It is a flaw that has been described as having the smell and taste of wet cardboard.
This term describes the unpleasant skunk-like odor beer can develop after exposure to light. To avoid this phenomenon, beer bottles are often brown, which protects the beer. This is also the reason that older taverns are traditionally dark inside.
Beer damaged by exposure to light.