Is use the tool "LED control" in amtm. Login in with your SSH console to the AIMesh node that you want to control the LED lights on. Activate and run amtm and install lc for led control. This way you can schedule a time when do turn them off and on or turn them off for 24h. I also use scMerlin toolset on the AIMesh router.
I do what Mutzli said, and it works great, although it doesn't seem to initially, and I have to go back into LED control, redo the schedule and then it works after.
Just access amtm via PuTTY or your favorite ssh terminal and then hit 'i' to show all the possible scripts you can add. Look for LED control and follow the steps provided.