Does lifting lighter weights for many repetitions help tone and thin the body?

As a very wise man once told me, if many repetitions were effective, then everyone who is overweight that chews gum should have a skinny face. I know many athletes who perform repetitive movements with light resistance, who have extremely large muscular legs, or arms. It is not the lightness or heaviness of a weight that produces a toned look, it is the little amount of body fat that there is on top of that muscle and how in shape the muscle is underneath. Make the muscle as strong as it can be with proper strength training techniques and eat fewer calories in a balanced manner than your body needs to sustain itself for the day, and you to will produce a toned physique.