For beer, light causes off-flavours (I'm no beer expert). IIRC, it is related to the hops, so maybe you would need to be extra careful with a braggot.
I ferment in PETE, which is clear. I keep the carboys out of direct sunlight (except when I sit it in the sun to warm the yeasties up in winter). But they sit in a room where they receive light indirectly (ie, it's not in a dark cellar with only artificial lighting).
I wouldn't lose sleep over it during fermentation. Avoid sunlight (direct) if possible during aging.
YMMV