Abstract
In this article, Design and development of a LED based outdoor luminaire is proposed and its performance parameters have been analyzed. Variable Correlated Color Temperature (CCT) of the light source can be controlled wirelessly. This light source consists of two arrays of Warm White (WW) and one array of Cool White (CW) LEDs. Light control logic has been developed to control the light output and Correlated Color Temperature (CCT). The range of CCT variation of the test light source lies within the CCT values of the WW and the CW LEDs. Pulse Width Modulation (PWM) technique has been applied to implement the light control logic and embedded in a microcontroller to control the light outputs of two WWLED arrays and a CWLED array of the light source. The developed system has been connected with the light source and controllable by a Smart Phone as a Hand Held Device (HHD) through WiFi connection. Experimental results establish the satisfactory performance of the developed system. It has wide variation in the CCT range, improved illuminance and can provide a controllable soothing nighttime landscape lighting environment as and when necessary.
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