a device for optimized management of fluorescent lamps with a control module having microprocessors with a control program in permanent memory ; an internal control program , stored in the memory ; and an electronic power module for direct power supply of lamps to change the voltage at the output within a range between a maximum power supply voltage and a lower appropriate voltage , at the command of the control module . the memory has at least some of the following accessories : a / d converters ; an internal &# 34 ; real time &# 34 ; clock ; an rs232 or rs422 asynchronous or synchronous serial interface ; earom , eeprom memory ; a keyboard with lcd or led display ; control pushbuttons and indicator lights ; and analog sensors for ac voltage , ambient light , external light , ambient temperature , power module temperature , and alternating current , the number and type of sensors being dependent on the selected configuration which in turn depends on user requirements . the internal control program has the following functions : automatic day / evening / night ; voltage stabilizer ; maximum economy ; constant luminosity ; bypass ; motor starting ; programming and remote dialog ; and independent management of outputs .