Elzetta releases a limited edition light in a unique, one-time-only configuration every year. The lights usually sell out pretty quickly and are never to be seen again. Past lights have included special black chrome finishes, colored anodization, and Cerakote. The details for this year’s limited edition light have not been released yet but you can register for a chance to win one!
I should also note that the promotional image for this giveaway might be a clue as to which light might be receiving the limited edition treatment this year. It appears to be an Alpha which would make sense considering it just received an output upgrade.