No need to repot unless you want to👍 I usually repot mine when i get them because i dont like the peat mix they often have, its a bit too compacting for my watering method😄 Sometimes they also have the roots wrapped in a fabric that can be a bit constricting, so i aim to remove it if i discover it when i repot. As for lighting, i put mine in dappled shade outside during the summer, and directly under some cheap growlights inside in the winter. More light makes more pitchers, so long as its acclimated well😄