Disclosed herein are embodiments of foam backing panels for use with lap siding and configured for mounting on a building. A clock signal CLK is fed, via a delay buffer with a capacitor as a delay element, to a FF disposed in the upstream of a logic circuit block having the longest processing time, and a clock signal CLK is fed, via a delay buffer with a transistor as a delay element, to a FF disposed in the downstream of the logic circuit block having the longest processing time. A shadow appears due to the oblique path of the illumination light L and it facilitates a stereoscopic observation. The segments of a given coil are coupled to each other, and the first and second coils can be interdigitated with each other. The control box further comprises electric wires and a connector to be connected with a connector of the cold cathode fluorescent lamp. The solution is permitted to cure while simultaneously exposed to both the circularly-polarized light and the applied magnetic field.