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Method for controlling a streetlight

  • US 9,253,853 B2
  • Filed: 12/17/2010
  • Issued: 02/02/2016
  • Est. Priority Date: 12/17/2010
  • Status: Active Grant
First Claim
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1. A method for controlling a streetlight that is provided to illuminate a portion of a street, the method being performed by a controlling device having a memory accessible by a processor which controls a steering module, which steering module is operatively coupled to the streetlight, the method comprising:

  • storing in said memory a predetermined maximum illumination intensity value Imax for said portion of the street;

    storing in said memory a maximum illumination intensity output value Omax of said streetlight;

    storing in said memory input/output values of said streetlight, said input values being control signals for said streetlight and said output values being corresponding percentages of said maximum illumination intensity output value of said streetlight;

    storing in said memory a maintenance factor Mf of said streetlight, said factor being a percentage of decrease of maximum illumination intensity output over a lifetime of said streetlight;

    storing and keeping up-to-date in said memory a running hours value RH of said streetlight;

    storing in said memory a maximum running hours value Mrh of said streetlight thereby defining the lifetime of the streetlight;

    calculating in said processor an actual percentage of said maximum illumination intensity output value % actual of said streetlight by a formula;

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