LED LIGHTING DEVICE

To provide a lighting device that prevents switching to a lighting state not intended by a user due to power cutoff from a higher-level power supply system during lighting or extinguishing operation.SOLUTION: A lighting device includes a power input monitoring circuit that detects interruption of power, and time determination means for determining the time of a power cutoff detection signal of a power cutoff detection circuit, and switching the lighting state of the lighting device when this time is within a predetermined time, and further includes a power failure reception circuit that receives power failure information from its own upper power system, and means for lighting the lighting device in the state before the power cutoff when the time of the power cutoff detection signal is within the predetermined time and when the power failure information is received from the power failure reception circuit during the power cutoff.SELECTED DRAWING: Figure 2 【課題】点灯または消灯動作中に、上位電源系統からの電源遮断により使用者の意図しない点灯状態に切り替わることを防ぐ照明装置の提供を目的とする。【解決手段】電源の遮断を検出する電源入力監視回路と、この電源遮断検出回路の電源遮断検出信号の時間を判定し、この時間が所定の時間内である場合に、照明装置の点灯状態を切り替える時間判定手段を備えた照明装置であって、自身の上位電源系統からの停電情報を受信する停電受信回路を備え、前記電源遮断検出信号の時間が前記所定の時間内である場合、かつ電源遮断中に前記停電受信回路から停電情報を受信した場合、照明装置の点灯状態を電源遮断前の状態で点灯させる手段を備える。【選択図】 図２