Perth Amboy, NJ: how dark is the sky here?
Perth Amboy reads as urban on this dataset's scale. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. Only 91.1% of the 3,206 cities measured here read darker than Perth Amboy.
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.
The nearest darker sky to Perth Amboy
The closest place in this dataset with a meaningfully darker sky is South Amboy, NJ, roughly 2 miles away in a straight line, rated suburban. Road distance will be more.
South Amboy, NJ is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Perth Amboy compares nationally
Perth Amboy, NJ has a population of about 56,939, one of 3,206 US cities of 10,000 or more residents in this dataset. Perth Amboy places 2,904 of 3,206 cities in this dataset's darkest-to-brightest order.