i'm fascinated with AR coatings. they are on my sunglasses, instrument cluster, and watch crystal, and apparently on the inside of my LOD. i just got some hardened mineral glass crystals for my 3c mag. i was thinking about taking them to my local eyeglass store that does inhouse AR coatings. so, i'm wondering if it would be worth it my time and money. i'm thinking it would be cool but probably not that useful on a 140 ish lumen light... thoughts?