Yoda wrote:Use as much weight as you can upto 8 reps max, 3 sets for each exercise.
I do almost the same thing. I use a weight I can definitely do 4 reps, but no more than 6 reps. I don't think doing lots of reps with lighter weights is the optimum method. Using heavier weights overload your muscles which forces them to adapt, which is how the get bigger (combined with good nutrition and maybe some supplements of course).