The LTRDx modules network via inexpensive category 5 cable and distances may exceed 3,000 feet between modules. They operate with most any solid state (LED) fixture driver and provide superior smooth dimming performance. With its heavy duty relay, the LTRDx modules keep power from being applied to the drivers so as to preserve better this vital component of the solid state light. In addition, the LTRDx modules provide amps, watts and volts readings of the individual LED fixture or lighting circuit.