This behavior has been coded this way so that you can fine tune all your light setting and then decide to scale up (or down) the whole scene without suffering from a drastic change in the lighting intesity.

• 这个特性使你能够对所有灯光设置进行调节，然后再调亮或是调暗整个场景，而不会受灯光亮度剧烈变化的影响。