Lyons, IL Night Sky Brightness
Lyons, IL's night sky, measured from orbit
Lyons reads as suburban on this dataset's scale. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. Only 72.3% of the 3,206 cities measured here read darker than Lyons.
Note the source: a satellite reading of upward light, not a visual Bortle scale reading. The two measure related but different things, explained in the Bortle scale guide.
The nearest darker sky to Lyons
4 miles from Lyons, straight-line, sits Justice, IL, the nearest city here with a darker sky than Lyons's own suburban band.
Justice, IL is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Lyons compares nationally
About 10,440 people live in Lyons, IL, sized enough to appear in this dataset of 3,206 incorporated US cities. Lyons's position, 2,304 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.