A strange thing happens to me, I need a part where there is no light and if I put the direction light upwards I have no light, but if I put it upwards exactly the same, playing if I have light
If you want to achieve a complete darkness in your level, you should disable your Directional Light entirely. You could do so via a script by either disabling the light component, or reducing its intensity to zero. Flipping the rotation coordinate is going to make the light shine from an upward angle, that’s all.
Disable directional light or change its color to the black
Also change Ambient source color to the black from Window->Rendering->Settings section