Germantown, TN: how dark is the sky here?
Satellite radiance puts Germantown 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. That's brighter than 28.6% of the 3,206 US cities in this dataset.
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 Germantown is from a meaningfully darker sky
24 miles from Germantown, straight-line, sits Atoka, TN, the nearest city here with a darker sky than Germantown's own suburban edge band.
Atoka, TN is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Germantown compares nationally
Germantown, TN counts roughly 40,128 residents, among the 3,206 US cities this site tracks. Germantown places 911 of 3,206 cities in this dataset's darkest-to-brightest order.