Physical, optical and electronical apparatus and accessories, namely, [ spectrometers and ] power supplies; [ optical apparatus, namely, optical cables, optical lenses; binoculars; ] signaling and life saving apparatus, namely, signaling lights consisting of cone or cap attached to a flashlight; laser pointers; [ light emitting diodes; ] switches; [ dimmers, namely, electric light dimmers; ] batteries for torches; [ button cell batteries, lead-acid accumulator; dry batteries; ] electric batte...