A Red LED Below The Top Speaker Of XT1068 topic

I dont know weather anyone has noticed it or not but i have noticed that there is a RED LED which glows when you are in a call on XT1068 MOTO G2 you can see the led only in complete darkness. The led is located under the top speaker i dont know if it glows everytime on a call or just when there is less batery left and you get a call.
Hope this can motivate developers to take advantage of the LED.