Purchased a pair of Orvis ultralights (name?) back in May. Dark green polycarbonate frame w/ yellow lenses. Absolutely love them for low light. Very light, very comfortable. They were a gift, but I think they go for $39. One not-so-minor complaint though: the frame around one of the lenses snapped the other day. Orvis came through though: returned them the next day & swapped for a new pair.
Find I wear them all the time except for super bright middays (alas I do very little fishing that isn't on the margins of the day so it hasn't been an issue).