If you'd like, I can also help you transpose the standard high-voice key (F major) down to a low-voice key like D major or C major. Just let me know.
I understand you're looking for a PDF of arranged for low voice (bass, baritone, or contralto), with the complete text (lyrics). o sole mio low voice pdf
Lùceno 'e llastre d'a fenesta toia; 'na lavannara canta e se ne vanta... e pe' tramente torce, spanne e canta, lùceno 'e llastre d'a fenesta toia. If you'd like, I can also help you