Burlington, IA: how dark is the sky here?
Satellite radiance puts Burlington in the suburban edge band. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Only 24.4% of the 3,206 cities measured here read darker than Burlington.
This comes from a satellite measuring light radiating upward, not a person's eyes on the ground, so it isn't the same as a Bortle class, though the two track each other closely.
How far Burlington is from a meaningfully darker sky
The closest place in this dataset with a meaningfully darker sky is Clinton, IA, roughly 85 miles away in a straight line, rated rural. Road distance will be more.
Clinton, IA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Burlington compares nationally
Burlington, IA counts roughly 23,637 residents, among the 3,206 US cities this site tracks. Burlington places 779 of 3,206 cities in this dataset's darkest-to-brightest order.