Begonia superba 'Salmon'

Full Sun: at least 6 hours of direct sunlight per day.

Part Sun: a half-day of direct sunlight is acceptable, even if it's afternoon sunlight.
Part Shade: a half-day of direct morning sunlight is acceptable.  Afternoon sunlight is too harsh and should be avoided.

Full Shade: filtered sunlight is best.  Direct sunlight should be avoided.