Abstract: A circuit device is designed to illuminate a series of Christmas ornamental lights in conjunction with a plug and an integrated circuit control box. The circuit device is formed of a resistor and two serially-connected capacitors which are linked to the resistor in parallel connection for bringing about a capacitive reactance serving to lower a voltage of an external alternating current to an extent that the voltage is suitable for operation of the integrated circuit control box.

Abstract: A light-emitting device is designed to cover removably a conic roadblock and is formed of a hollow conic body and a plurality of warning units. The hollow conic body is formed of an outer fabric layer and an inner fabric layer. The warning units are disposed on the outer fabric layer of the conic body. The conic body is fitted over the conic roadblock. The warning units are provided with a light-emitting diode to make the conic roadblock vividly visible to the operator of an approaching motor vehicle.

Abstract: An illuminant triangular warning arrangement includes a clothe body and a plurality of illuminating units provided on the clothe body. Each illuminating unit provides a transparent layer, a circuit board, a casing socket, a fitting washer, a photodiode (LED), a battery box, and a manual switch. With the combination of the above elements, the illuminant triangular warning arrangement is in used, its displaying area is large enough to catch other drivers attention from far away. When the illuminant triangular warning arrangement is not in used, it can be folded into a compact package, so that it would not occupy unnecessary space in the trunk of the vehicle for easy storage.