A lamp module has a base with first and second electrical contacts for
inserting into a socket in alternate orientations. A printed circuit
board is mounted to the base and has a reverse polarity circuit coupled
to the first and second electrical contacts for converting a DC potential
across the first and second electrical contacts to a power supply
voltage. A current regulator has a first terminal receiving the DC power
supply voltage from the reverse polarity circuit. A programming circuit
provides a programming current to a second terminal of the current
regulator to generate an output current in response to the programming
current. An LED matrix is mounted to the base and has an input coupled
for receiving the output current of the current regulator. The LED matrix
has interconnected LEDs which emit a light intensity in response to the
output current of the current regulator.