LIGHTING APPARATUS

PROBLEM TO BE SOLVED: To provide a lighting apparatus which makes a user feel comfortable, when the color temperature changes.SOLUTION: A lighting apparatus includes a first LED having a first color temperature, a second LED having a second color temperature lower than the first color temperature, a first lighting circuit outputting a current for lighting the first and second LEDs, a second lighting circuit for dividing the output current from the first lighting circuit into a current flowing to the first LED and a current flowing to the second LED, and a control circuit for controlling the first and second lighting circuits, and determining the current ratio of the curent flowing to the first LED to the current flowing to the second LED. The control circuit increases the total flux, i.e., the sum of the flux outputted from the first LED and the flux outputted from the second LED, as the current ratio increases.SELECTED DRAWING: Figure 10 【課題】本発明は、照明器具に関し、色温度が変化する際に使用者が心地よく感じる照明器具を得ることを目的とする。【解決手段】 本発明に係る照明器具は、第１色温度を有する第１ＬＥＤと、該第１色温度よりも低い第２色温度を有する第２ＬＥＤと、該第１ＬＥＤと、該第２ＬＥＤと、を点灯させる電流を出力する第１点灯回路と、該第１点灯回路の出力電流を、該第１ＬＥＤを流れる電流と該第２ＬＥＤを流れる電流とに分ける第２点灯回路と、該第１点灯回路と、該第２点灯回路と、を制御し、該出力電流のうち、該第２ＬＥＤを流れる電流に対する該第１ＬＥＤを流れる電流の電流比率を決定する制御回路と、を備え、該制御回路は、該電流比率が大きくなるほど、該第１ＬＥＤから出力される光束と該第２ＬＥＤから出力される光束との和である合計光束を大きくする。【選択図】図１０