Light-emitting device, lighting device, and optical member

A light-emitting circuit, comprising:

• first light-emitting elements;
• second light-emitting elements;
• and
• resistance elements,
• wherein a color temperature of light emitted from the second light-emitting elements is different from a color temperature of light emitted from the first light-emitting elements,
• wherein an anode side terminal of a first circuit and an anode side terminal of a second circuit are connected to a first terminal of a direct-current power supply, the first circuit including the first light-emitting elements and the resistance elements, the first light-emitting elements and the resistance elements being connected in series in the first circuit, the second circuit including the second light-emitting elements,
• wherein a cathode side terminal of the first circuit and a cathode side terminal of the second circuit are connected to a second terminal of the direct-current power supply,
• wherein a luminous flux of the first light-emitting elements increases as a current input from the direct-current power supply increases in case that the current is less than a first current value,
• wherein a luminous flux of the second light-emitting elements increases as the current increases in case that the current is more than a second current value, and
• wherein the second current value is less than the first current value.

A light-emitting circuit, comprising:

• first light-emitting elements;
• second light-emitting elements;
• and
• resistance elements,
• wherein a color temperature of light emitted from the second light-emitting elements is different from a color temperature of light emitted from the first light-emitting elements,
• wherein an anode side terminal of a first circuit and an anode side terminal of a second circuit are connected to a first terminal of a direct-current power supply, the first circuit including the first light-emitting elements and the resistance elements, the first light-emitting elements and the resistance elements being connected in series in the first circuit, the second circuit including the second light-emitting elements,
• wherein a cathode side terminal of the first circuit and a cathode side terminal of the second circuit are connected to a second terminal of the direct-current power supply,
• wherein a color temperature of a mixed light emitted from the first light-emitting elements and the second light-emitting elements is constant in case that a current input from the direct-current power supply is less than a current value, and
• wherein the color temperature of the mixed light changes according to the current in case that the current is more than the current value.