Streamline

The Streamline mod increases your warframes Power Efficiency, which decreases the energy cost of abilities. The description states that at max level, it will reduce the energy cost of abilities by 30%. However, in-game, the result of using a max level Streamline mod are different than expected.

Power Efficiency Returned Values
Using a max level Steamline mod, the returned Power Efficiency values are not the indicated 30%. Instead, in-game values seem to change depending on the base amount of energy needed to activate an ability.