As a rough estimate, the illumination should be of the same order of magnitude as a clear, moonless night on Earth, which at about 200 microlux of illumination is about 500 million times fainter than a clear summer noon at mid-latitudes, or about 1250 times fainter than a full moon.

With fully dark-adapted eyes, it won't be complete blackness, but it would be pretty damn close, certainly too dark to make out anything but rough shapes. If you want any fine details to be visible the way they are on ships in scifi, you will need artificial illumination.