My acog ta02 - Trijicon ACOG TA02 4x32mm Rifle Scope, 32mm Tube

I chose this model because ACOGS are built like tanks. Tough, durable and almost indestructible and yet the illumination vehicle has a shelf life between 9 and 11 years. My understanding is that Trijicon with refill the tritium gas for approximately $600 plus but what will it cost 11 years from now? Anyway, I can afford good batteries and it’s the correct product for me and my needs at this time. Anyway, shoot straight and stay responsible �