Abstract: The invention concerns an optomechanical system (10a, 10b) for light regulation and electricity production, comprising a semi-transparent photovoltaic module (23) comprising a plurality of bifacial photovoltaic cells (30) arranged in rows and columns, with gaps (32) between the rows and/or columns, through which sunlight may be transmitted; at least one optical arrangement (40) located in an actuation plane (Pa, Pb) behind the semi-transparent photovoltaic module (23), and comprising at least one reflective optical element for redirecting light towards a back side of the photovoltaic module; and a control system (60) configured to operate the at least one optical arrangement (40) to adjust a projected area of said at least one reflective optical element on said actuation plane (Pa, Pb).