Lighting device

Abstract

An LED lighting device is provided which is capable of being connected to a network and being controlled by a host computer also connected to the network. The lighting device has several lifespan expanding features such as including several extra LEDs such that as the LEDs of the lighting device degrade over time more LEDs can be turned on thus allowing a constant luminosity to be maintained.

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       8 . A network comprising: 
 a host computer, and    a plurality of light emitting diode lighting devices;    said host computer comprising:    means for transmitting a request for a status report from each of said light emitting diode lighting devices. and    means for transmitting a signal to each of said light emitting diode lighting devices such that the host computer can direct how much light each of said a) lighting devices emits; and    each of said plurality of light emitting diode lighting devices comprising:    means for receiving a request for a status report from said host computer, creating said status report, and transmitting said status report to said host computer; and    means for receiving a signal from said host computer and altering how much light said light emitting diode device emits in response to said signal.    
   
   
       9 . A network as claimed in  claim 8 , wherein said status report comprises current luminosity setting, current actual luminosity output, current light emitting diode degradation, current dirt accumulation, current number of light emitting diode groups in use, current number of open-circuited light emitting diode groups and current average usage time of light emitting diode groups;  
   
   
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