DayNight_How to make My Night more Darker?

I already got my daynightCycle blueprint like the pictures.
and i lower the Skylight , Sunlight intensity and shadows , the fog density and distance .
but the sky is still so light (as the picture) , i wanna make my night more darker that it makes you
nearly need a torch to see .

i tried to change the skysphere’s color to all black , it seems that works a bit , but i wanna keep the visual of
it and lower the lightness at the same. is there any way to make it? , thanks a lot for helping!!!