What is StandardDeferredSimpleLights and how to optimize it?

I am trying to optimize lightning in my scene.
First I tried to change some of the light sources from stationary to static.
As I assumed, it would bake some of the light in scene and performance would increase.
But, as GPU Visualizer shows, NonShadowLights takes most of the time (26,85 ms) while ShadowedLights takes only 2,12 ms.
So, as I understand, the main performance issue is not the need to bake light.
There is StandardDeferredSimpleLights whitch takes most of the time. But I don’t know what StandartDeferedSimpleLights what should I do to male it’s calculations quicker.
Any help would be appreciated!