I think we could use this for more then just sunglasses. What about using it in a high rise building. I'm sure some architect could work having blue windows into the design of the building. Or what about if your office had blue windows during the day to give a nice calming blue tinge to the work environment but at night turned clear to allow a clear view of the city? I could see airlines (Virgin Atlantic specifically) installing these since they already have blue interior lights. What about night time use - does the small amount of UV light given off by a star cause it to appear blue? I think there's more possibilities then just sunglasses or data storage.