I can't exactly remember I want to say close to the same, we only did two from the package that was around 1.2 they took roughly 2hrs and a few minutes somewhat in direct how they were placed. not really sure the time difference this was just going by internal temp we were shooting for.
Those burgers look great. How big are the burgers? I've smoked them before, but they seem to get done within about 45 minutes. How did you smoke them that long? Mine were around a half pound. I was cooking at a similar temperature as you.