luminaria
light fixture
luminous
shining, bright
+
-aria
noun suffix (related to)
Luminaria means light fixture and can be thought of as luminous0 (shining, bright0) + -aria1 (noun related to1), literally meaning 'something related to being luminous'.
noun
- light fixtureA light fixture or source of illuminationInstalaron nuevas luminarias en el parque. // They installed new light fixtures in the park.