Khrustalnyi or Krasnyi Luch is a city in Rovenky Raion of Luhansk Oblast of south-eastern Ukraine. It is incorporated as a city of oblast significance. Its population is approximately 79,533.
The city came under the control of the pro-Russian Luhansk People's Republic in early 2014. After the September 2022 annexation referendums in Russian-occupied Ukraine, Russia claimed the city as part of Russia.
Wikipedia https://en.wikipedia.org/wiki/Krasnyi_Luch
Coordinates 48°8'6.53" N 38°55'11.621" E