the aesthetic appearance of the light emitted looks similar to the incandescent version referring to fig2 an integrated electronics current driver board 16 provides constant current to the led device 12 over the full design input voltage range of 10 30vdc the driver board 16 consumes less than 4 watts of power to produce approximately the same amount of light output as the conventional 10watt bulb that it replaces the led lamp module 10 is a direct replacement for the incandescent light assembly the electronic driver design shown in fig2 a allows the led light output to remain constant over the entire voltage range the integrated electronics uses a switching regulator to efficiently convert 75 or greater the input energy to the form required of the led 12 the electronic driver design also provides transient protection to guard against input power fluctuations and emi electromagnetic interference filtering to prevent interference with other electrical equipment in the vicinity of the light fixture an optional dimming feature via dimming circuit 19 is provided so that the operator can adjust the light level as desired the electronics board 16 is designed in a u201c donut u201d or annular form factor to u201c piggyback u201d on top of the led board 18 and around the host fixture 39 s reflector as will be described below in relation to fig6 and 7 to.