There have been a number of threads on the same topic of “indicator used for X”- I’ve got a few linked Here.
My main concern has been the cost- I’d really like to have and indicator that costs less then $30.
I’m currently working on using a breakdown of the Cree bulb Zigbee board- I’m not sure what the cost will be when it’s all said and done, but it’s been an educational experience! 