Roughly 2.5 hrs. Sorry no notes on time. Just one large cigar and about an 1.5 hrs. A couple times a month I light up a big one and sit on the patio just smoking and smelling the Cookshack.
SmokinM. Smokin taught me that trick after I literally injected a brisket, the counters, cabinets, microwave, fridge, oven and myself. It does the job.