Kettlebell Difference in training adaptations - higher rep sets Vs higher volume of low rep sets?

[Alexander Halford]

@Alexander Halford, PlanStrong and BuiltStrong have figured out all this.

-S-

No doubt about it.
I was more interested to know what "lighter weight" they're talking about in this experiment, something around 50% of 1rm, or more towards 70% of 1rm (in this case it makes sense to me). Another question - same strength levels reached, or preserved?