Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
well-lighted is an adjective meaning "provided with artificial light". It carries one recorded sense.
provided with artificial light
“illuminated advertising”
“looked up at the lighted windows”
“a brightly lit room”
“a well-lighted stairwell”
Definitions, synonyms and semantic relations for well-lighted come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.