Patent ID: 6933677

Claim:
A magnetically shielded fluorescent lamp ballast case for shielding humans from harmful effects of the magnetic component of electromagnetic fields emitted from a fluorescent lamp ballast, by reducing the magnetic component of the electromagnet fields emitted from the electrical and electronic components within said fluorescent lamp ballast, particularly the magnetic component of said electromagnetic fields between 60 Hertz and 100 Kilohertz, comprising: a generally rectangular fluorescent lamp ballast case enclosing said electrical and electronic components, said fluorescent lamp ballast case having holes in said fluorescent lamp ballast case to insert external connecting wiring: said fluorescent lamp ballast case being made of a shielding material absorbing the magnetic component of the electromagnetic fields; said magnetic shielding material being a soft ferromagnetic metal alloy having an initial magnetic permeability of at least 200 gauss/oersted, and, said magnetic shielding material providing attenuation of magnetic fields up to 100 Kilohertz.