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Apparatus and method of energy efficient illumination using received signals

  • US 9,713,228 B2
  • Filed: 12/01/2014
  • Issued: 07/18/2017
  • Est. Priority Date: 04/12/2011
  • Status: Active Grant
First Claim
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1. A method of operating an illumination system including at least one light source and at least one controller, the method comprising:

  • detecting a level of light in an ambient environment;

    comparing by the at least one controller the detected level of light in the ambient environment to a first threshold;

    validating by the at least one controller a result of the comparison of the detected level of light in the ambient environment to the first threshold with respect to at least one expected condition, the at least one expected condition comprising an expected level of light for at least one of a current location, a current date or a current time; and

    adjusting by the at least one controller an output of the at least one light source when both the detected level of light in the ambient environment at least satisfies the first threshold and the result of the comparison is valid with respect to the at least one expected condition.

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