Stars put out quite a bit of light in remote areas, cloud cover may block ~75% of this, but it&#x27;s still far from &#x27;pitch black&#x27;.  One of the stranger things about caving is it just keeps getting darker as you go deeper.<p>PS: As a kid I used to spend a lot of time walking around in starlight.  I only ever really used a flashlight inside.  I moved much closer to a city and light pollution is terrible to the point where there is little need to turn lights on in my apartment unless I want to read something.