Light-emitting apparatus, luminaire, and method of adjusting light-emitting apparatus

A light-emitting apparatus to which a constant current corresponding to a dimming level is supplied from a constant current supply, the light-emitting apparatus comprising:

• a light source unit to which the constant current is supplied, and which includes:
• a first light-emitting element column including one of a single first light-emitting element or a plurality of first light-emitting elements connected in series;
• and
• a second light-emitting element column connected in parallel with the first light-emitting element column, and including one of a single second light-emitting element or a plurality of second light-emitting elements connected in series;
• a first detector circuit which is connected in series to the first light-emitting element column, and detects a magnitude of a current flowing through the first light-emitting element column;
• a current adjuster circuit which adjusts a relationship of the magnitude of the current flowing through the first light-emitting element column to the constant current, based on the magnitude of the current detected by the first detector circuit;
• and
• a relationship adjuster circuit which adjusts the dimming level at a changing point at which a relationship of the magnitude of the current flowing through the first light-emitting element column to the dimming level changes as a result of adjustment by the current adjuster circuit.