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A lighting apparatus for use with a name plate sign includes an elongate frame having a planar bottom with an upper portion defining an interior space. The frame bottom includes a bracket for attachment to the name plate. A rechargeable battery is mounted within the interior space of the frame and i

A lighting apparatus for use with a name plate sign includes an elongate frame having a planar bottom with an upper portion defining an interior space. The frame bottom includes a bracket for attachment to the name plate. A rechargeable battery is mounted within the interior space of the frame and is electrically connected to a plurality of light sources depending from the frame bottom. A thin film solar panel is positioned atop the upper frame portion and is electrically connected to the battery to repeatedly recharge it as the panel collects solar energy. A photoelectric light sensor is mounted to the frame and permits current to flow from the battery to the light sources when a sensed level of ambient light is less than a predetermined level. Therefore, the name plate is illuminated when insufficient ambient light is available.

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A lighting apparatus for use with a name plate sign includes an elongate frame having a planar bottom with an upper portion defining an interior space. The frame bottom includes a bracket for attachment to the name plate. A rechargeable battery is mounted within the interior space of the frame and i

A lighting apparatus for use with a name plate sign includes an elongate frame having a planar bottom with an upper portion defining an interior space. The frame bottom includes a bracket for attachment to the name plate. A rechargeable battery is mounted within the interior space of the frame and is electrically connected to a plurality of light sources depending from the frame bottom. A thin film solar panel is positioned atop the upper frame portion and is electrically connected to the battery to repeatedly recharge it as the panel collects solar energy. A photoelectric light sensor is mounted to the frame and permits current to flow from the battery to the light sources when a sensed level of ambient light is less than a predetermined level. Therefore, the name plate is illuminated when insufficient ambient light is available. termined point located between said potential setup resistor and said another end of said search coil and measures an electrical potential at said predetermined point. 4. The magnetic flux detector as set forth in claim 3, wherein said high voltage, which is supplied by said high potential setup circuit, and said low voltage, which is supplied by said low potential setup circuit, are both positive values. 5. A magnetic flux detector comprising: a magnetic flux generator, which generates a magnetic flux, said magnetic flux generator including a core member and an armature member forming a magnetic path; a search coil, which is placed in said magnetic path where the magnetic flux generated by said magnetic flux generator passes, such that an electromotive force is induced in said search coil in response to a change in the magnetic flux; and a magnetic flux calculator, which determines the magnitude of the magnetic flux generated by said magnetic flux generator by measuring the electromotive force induced in said search coil, said magnetic flux calculator having an inlet for connection to said search coil; wherein: a potential setup resistor with a resistance larger than an internal resistance of said search coil is provided at the inlet of said magnetic flux calculator; an excitation current is supplied to an exciting coil to generate said magnetic flux which passes through said core member and said armature member, generating an attraction force that attracts said armature member toward said core member; and said attraction force is controlled on a basis of the magnetic flux determined by said magnetic flux calculator. 6. The magnetic flux detector as set forth in claim 5, wherein said magnetic flux calculator comprises a high potential setup circuit, which is connected to one end of said search coil and supplies a predetermined high voltage, a low potential setup circuit, which is connected through said potential setup resistor to another end of said search coil and supplies a predetermined low voltage, and an electrical potential measuring device, which is connected to a predetermined point located between said potential setup resistor and said another end of said search coil and measures an electrical potential at said predetermined point. 7. The magnetic flux detector as set forth in claim 6, wherein said high voltage, which is supplied by said high potential setup circuit, and said low voltage, which is supplied by said low potential setup circuit, are both positive values.