This is the 13417th most frequent German word.
beleuchtet
Illuminated or lit.
In this sentence, 'beleuchtet' is used as a past participle adjective to describe a state of being lit or illuminated.
Die Straße ist gut beleuchtet.
The street is well lit.
Here 'beleuchtet' is used as a past participle of the verb 'beleuchten' in a figurative sense, indicating that the problem has been examined or illuminated from all perspectives.
Er hat das Problem von allen Seiten beleuchtet.
He examined the issue from all sides.
This usage of 'beleuchtet' as a past participle describes the condition of the painting being artfully illuminated.