This page, which regularly changes, provides discussion of various faults, flaws and taints that may affect wine. The current topic is lightstrike.
Lightstrike may affect wines bottled in clear glass (flint) bottles. The fault, which can haveserious organoleptic impacts, is most likely to affect sparkling wines and white and rosé wines - red wines have a higher degree of protection due to their higher levels of phenols.
Lightstrike also affects milk, and beers - thankfully most ales or bottled in brown glass - and brewers have to adjust hopping regimes if the marketing departments insist that they are bottled in clear bottles. Whilst there can be little doubt that white and rosé wines can look tempting when bottled in clear glass, there is no doubt whatsoever that this can be hugely damaging to the product. The photo taken in a supermarket in France, shows two bottles of Sauternes from the same property and same vintage. The bottle on the left has been taken from the shelf and is the victim of lightstrike, the bottle on the right is newly removed from the carton.
Louis Roederer Cristal, regarded by many as a particularly fine 'de-luxe cuvée' Champagne, is bottled in clear glass, but this is wrapped in orange coloured cellophane, which filters up to 98% of UV light. Interestingly, Louis Roederer was the first major Champagne house to switch to brown (amber) bottles (for wines other than Cristal) in 2010; since then, several other houses have followed suit including Piper-Heidsieck and Drapier, so it would seem that at last the Champagne industry is beginning to take the problem seriously.