This is the 6336th most frequent Turkish word.
ışıkları
"Işıkları" means "the lights" in English.
The word 'ışıkları' refers to 'the lights' in the accusative case used as an object of the verb 'kapatmak' (to turn off).
Işıkları kapatmayı unuttum.
I forgot to turn off the lights.
Here, 'ışıkları' describes aesthetic lights (decorative lighting) with a possessive sense implying the lights of the night.
Parkta gece ışıkları çok güzel görünüyor.
The night lights in the park look very beautiful.
In this sentence, 'ışıkları' symbolizes metaphorical lights (illumination or radiance), referring to the lights emanating from one's eyes.