From what I understand, there is minimal, if any, protection from light with green glass. Typically it is a marketing thing. I seem to remember reading something somewhere that some of these brewers use a special chemical to help prevent skunking but it only helps temporarily.
Many brewers who use greem or clear bottles use treated hop extracts instead of hops. The treatment consists of modifying the alpha acids by hydrogenating some of the double bonds so that they don’t participate in the skunking reactions, IIRC.
I see an open six-pack of Heineken sitting on the top shelf under the fluorescent lights at the store and I think, that six-pack carrier should be black with a white stripe.
Set a six pack of Heineken in direct sun for half an hour then cool it down and (try) to drink one. When I lived in Las Vegas you couldn’t finish a Hienny by the pool before it got skunky.
AFAIK the 330ml bottles have always been brown but Dupont is moving the 750ml bottles to brown as well.
As much as a handful of American saison brewers wax philosophical about the magic of green bottles and how Belgian saison brewers intend for skunking to be part of the beer’s character that’s just not true. It was cost prohibitive to get brown 750ml champagne bottles in Belgium for a long time. Somebody asked Brasserie Dupont about this and that’s the response they gave.