The device included in the portable lighting apparatus called 'Gando' is made up of nonflammable materials--in general, a cylindrical trapezoid chassis produced by rolling a metal plate such as copper or tin, and a candle holder and a reflecting mirror both of which are placed inside the chassis.
強盗（がんどう）若しくは龕灯（がんどう）と呼ぶ携帯型の照明器具の仕組みは不燃性の材料を用い、一般的には銅版やブリキ板等の金属板を丸めた円筒台形の筐体をもち、筐体の中にはろうそく立てと反射鏡が入っている。