[Kameron8]

Not that I don't like some good number crunching, but if we got an identical armor piece that said "reduce the damage of spells by 12.5%-25% when cast from a weapon with X or less weight", people would rightfully raise an eyebrow.  Just because not everybody builds for crit, and not everybody is unlucky enough to run a lightweight weapon, doesn't mean the power level isn't very high.