LED LIGHTING DEVICE AND LED LIGHTING METHOD

摘要

To provide an LED lighting device capable of lighting an LED lamp at a suitable luminance without manual operations. In order to provide the LED lighting device, an LED lighting device (1) according to an embodiment of the present invention is provided with: a constant current output unit (2) for flowing a constant current to an LED lamp (50); a voltage measuring unit (3) that measures the voltage Vf of the LED lamp (50) while the constant current output unit (2) is flowing the constant current to the LED lamp (50); an output voltage determining unit (4) that determines, on the basis of the voltage Vf of the LED lamp (50), a voltage Vout to be applied to the LED lamp (50), said voltage Vf having been measured by the voltage measuring unit (3); and a voltage output unit (5) that applies to the LED lamp (50) the voltage determined by the output voltage determining unit (4).