A solid state light apparatus ideally suited for use in traffic control signals having a Self Diagnostic/Predictive Failure Analysis (SD/PFA) function facilitating a real time status of the signal as well as prediction of failure years in advance of the actual failure. Unlike incandescent signals, all...http://www.google.es/patents/US6448716?utm_source=gb-gplus-sharePatente US6448716 - Solid state light with self diagnostics and predictive failure analysis mechanisms
Solid state light with self diagnostics and predictive failure analysis ...
