Lumina, Constanța

Lumina (Romanian for "the light") is a commune in Constanța County, Northern Dobruja, Romania.

The commune includes three villages:
 * Lumina (historical names: Valea Neagră (until 1965); Cogealia, Kogea-Ali (until 1929) - Kocaali, Kodschalie)
 * Oituz - established in 1926, named after Oituz (Bacău County)
 * Sibioara (historical name: Cicrâcci, Çıkrıkçı)

Demographics
At the 2021 census Lumina had a population of 10,770 with a majority of Romanians (72.31%) and minorities of Tatars (2.35%), Roma (2.27%), Turks (0.24%), Lipovans (0.11%), Germans (0.05%), Bulgarians (0.03%), others (0.27%) and unknown (22.37%).

At the 2011 census, Lumina had 7,619 Romanians (93.82%), 104 Roma (1.28%), 95 Turks (1.17%), 282 Tatars (3.47%), 4 Aromanians (0.05%), 17 others (0.21%).

A large community of Csángó Hungarians lives in the village of Oituz.