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Light pollution in Vietnam

48 cities · estimated Bortle class at each city centre
7 of 48 cities read Bortle 8–9 · 30 of 48 cities read Bortle 7–8 · 9 of 48 cities read Bortle 6–7 · 1 of 48 cities read Bortle 5–6 · 1 of 48 cities read Bortle 4–5. The darkest city centre on the list is Ba Vì (Bortle 4–5).
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Cities, brightest first

#CityBortle (est.)Brightness2 classes darker
1Ho Chi Minh City8–9255~25 km W
2Biên Hòa8–9255~25 km NNE
3Hanoi8–9255~25 km SSW
4Thủ Dầu Một8–9254~25 km NE
5Tân An8–9248~25 km NW
6Phan Thiết8–9244~25 km SSE
7Haiphong8–9241~25 km SE
8Mỹ Tho7–8254~25 km NW
9Bắc Ninh7–8255~25 km N
10Bến Cát7–8238~25 km NNW
11Phú Mỹ7–8229~25 km SW
12Da Nang7–8243~25 km NE
13Nha Trang7–8252~25 km ESE
14Thành Phố Bà Rịa7–8243~25 km SSE
15Ðà Lạt7–8255~25 km WNW
16Nam Định7–8254~25 km SSE
17Cần Thơ7–8228~25 km SE
18Hạ Long7–8218~25 km SE
19Bắc Giang7–8241~25 km NE
20Vinh7–8255~25 km ENE
21Buôn Ma Thuột7–8244~25 km NNE
22Điện Bàn7–8186~25 km E
23Hải Dương7–8212~25 km SSW
24Quảng Ngãi7–8220~25 km E
25Thanh Hóa7–8234~25 km SE
26Vũng Tàu7–8251~25 km SSW
27Xuân Lộc7–8205~25 km NNW
28Phan Rang-Tháp Chàm7–8230~25 km SE
29Huế7–8247~25 km NE
30Qui Nhon7–8243~25 km ENE
31Cao Lãnh7–8251~25 km NNE
32Long Xuyên7–8237~25 km WSW
33Sa Dec7–8247~25 km NE
34Thị Trấn Đông Triều7–8204~25 km NE
35Việt Trì7–8249~25 km NNW
36Phổ Yên7–8228~25 km NNE
37Thái Nguyên7–8225~25 km NNE
38Cà Mau6–7248~25 km WNW
39Hà Tĩnh6–7236~25 km ENE
40Sóc Trăng6–7246~25 km NNE
41Rạch Giá6–7233~25 km W
42Ninh Hòa6–7219~25 km ENE
43Kon Tum6–7241~25 km NNE
44Lạng Sơn6–7242~25 km W
45An Nhơn6–7127~25 km ENE
46Phu Quoc6–7223~25 km SSW
47Nghi Sơn5–679~25 km ESE
48Ba Vì4–518not within 90 km

Brightness is the NASA VIIRS Black Marble 2016 value at the city centre on a 0–255 scale; 255 is saturated. Cities are ordered by estimated sky brightness, which also counts the light within 30 km.