I waded through a lot of info on lamps and bulbs, and my conclusion is that bulbs such as these aren't worth any more than standard bulbs, and may have less output even than high-output bulbs with no filtering. It is a myth that bulbs balanced toward blue improve visibility - tests show improved visibility more to the yellow. Lamps assemblies that improve the pattern and uniformity - such as some HID units - will improve visibility, but the color temperature is not the reason.
Check the recent Consumer Reports on auto lighting. Interesting results and useful info. I would use the faded filter on your lamps as an excuse to return them and save some money.