The main goal is to lower energy consumption when the light is not needed.

主要目标是当不需要点亮街灯的时候降低能源消耗。

We've got ample data that indicate that we make better metal, at lower energy consumption rates, and without any greenhouse gas emissions.

我们有充足的数据表明，我们以更低的能耗率生产出更好的金属，而且没有任何温室气体排放。