ambientLight not working?

[bitter hemlock]

I follow this youtube tutorial:
https://www.youtube.com/watch?v=f-Q8vOb5qRY
and set my scene with ambientlight like this:

    App::new()
        .insert_resource(ClearColor(Color::rgb(0.1, 0.0, 0.15)))
        .insert_resource(AmbientLight {
            color: Color::default(),
            brightness: 0.75,
        })

but my scene appear dark, seems like the ambientlight is not working at all.
what did I do wrong?
I am using bevy 0.13.0 on macos sonoma.

[short blaze]

Try to increase the brightness by a ton

[bitter hemlock]

i did increase to 3.0, still the same darkness

hmm, I increase to 500.0 only get to see the plane.

is there a big change from 0.12 to 0.13 on the ambientlignt?