(57) An apparatus for controlled supply of lighting systems powered by an alternating
voltage (VAC) source, with interposition of protection means and supplying a plurality of electric
loads (L1, L2, ..., Lj, ..., Ln), includes a device for converting the alternating voltage (VAC) into a direct voltage (VDC), made available at the outlet terminals. A plurality of modulating units (U1, U2, ..., Uj, ..., U,) are connected respectively to the plurality of electric loads (L1, L2, ..., Lj, ..., Ln) and supplied by the direct voltage (VDC). Each unit (Uj) includes at least one solid state electronic switch (E1, E2, ..., Ej, EJA, EJB, EJC, EJD), which is enabled/disabled to allow circulation of an electrical current (Ij) through the corresponding load (Lj). A central unit is provided for enabling/disabling the solid state electronic switches
(E1, E2, ..., Ej, EJA, EJB, EJC, EJD, ...,En) by respective control signals (S1, S2, ..., Sj, SJA, SJB, SJC, SJD, ..., Sn), according to a prefixed modulation technique.
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