A portable electric lamp including a lighting module, a compact housing enclosing an electric power storage unit configured to provide a power supply current to the lighting module, means for measuring a current consumed by the lighting module, determination means configured to generate a lighting current set point, calculation means for calculating a maximum authorized current from a difference between the consumed current and a reference current and for calculating a maximum authorized current threshold from the minimum value between the lighting current set point and the maximum authorized current, and limiting means configured to limit the power supply current to a value lower than or equal to the maximum authorized current threshold.