More than likely just a couple. It depends on the dosage.
How important is the clen for fat-burning?Say your diet, training and cardio are good and you lose 15 lbs in 8 weeks without clen, and under the exact same circumstances you took clen all along, would there be many additional lbs lost from the clen, or just a couple?
with moderate dose ( around 100mcg/day), i would say you'd lose 7-8 lbs more during that 8 week cycle. add t3 and another 7-8 lbs lost
where are you getting these numbers?