I'm picking up a GLOCK later this week, so I had some Warren/Sevigny two dot sights ordered and shipped to me. Anyway, this is my first experience with buying night sights and I noticed that the lamp date for the front sight was "10" whereas the rear was "13".

I understand that the tritium lamps are guaranteed for 12 years. So my question is, is it normal to receive a sight whose lamp life is already 33% spent? I was wondering if this is normal at all. Otherwise I'll talk to the dealer who sold it to me though I doubt it's his fault as he most likely didnt package the product.