Learn Danish: Hun er i høj grad afhængig af belysningen. - She is dependent on the lighting to a high degree.

In this sentence, the fixed phrase i høj grad functions as a central adverb, so it goes immediately after the finite verb (er) in a main clause. While you could technically put it at the end of the sentence, placing it mid-sentence is much more natural and common in Danish when it directly modifies the degree of an adjective like afhængig.

Could I use i vid udstrækning instead of i høj grad in this sentence?

Yes, they are very similar, but they carry a slight nuance. I høj grad translates to "to a high degree" or "highly," which pairs perfectly with the intensity of a personal state like being afhængig (dependent). I vid udstrækning means "to a large extent" and often implies how broadly or widely a situation applies. Both are grammatically correct here, but i høj grad sounds most natural for this specific meaning.

Why does Danish use af after afhængig when English says "dependent on"?

Prepositions rarely translate one-to-one between English and Danish. The adjective afhængig strictly dictates the use of the preposition af. A great way to remember this is to look at the root of the word: hænge means "to hang." Just like something hangs "from" a thread, in Danish you are dependent "from" (af) something.

What is the difference between saying belysningen and just lyset here?