How to go make scene full black at night. My assets all glow when sun is down

Hi,

I ma using UE5. I have kept the lighting setting of the basic project.
Recently however, when I use ‘Ctrl + L’ to go into night mode (sun below world plan, even though the sky is dark, all may assets and landscapes glow. I want everything to be black and only have the scatter lighting from actual nigh light sources

Thanks you
S