1.

LEDs (Light Emitting Diodes) are available in many colours such as red, green, yellow, blue and white and are increasingly being used for many applications, for example in traffic signal lights. But in everyday life we use CFLs and are currently the best choice because

Answer»

LEDs (Light Emitting Diodes) are available in many colours such as red, green, yellow, blue and white and are increasingly being used for many applications, for example in traffic signal lights. But in everyday life we use CFLs and are currently the best choice because



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