andon

Roma-ji   （ローマ字）:  andon
Kanji            （漢字）:  アンドン
Hiragana  （ひらがな）:  あんどん

Andon (a type of alarm system, often refers to a tower of lights of different colors with different status conditions assigned to different color lights, but can also refer to boards with sections that light up for different status conditions)