From the support FAQ of the eero wifi router:
If you’d like to turn off the LED light on your eero, you can do so either through the eero application or through the Amazon Alexa skillset.
I love this so much. As more and more of our physical objects light up with digital smarts, they’re lighting up literally, too—and often somewhat gratuitously. Every new gadget seems to impose bright, flashing lights on our living rooms, bedrooms, and offices.
Kudos to eero for offering a software setting to give users back control of their physical environment. Looking forward to the moment when “Alexa, ask eero to turn off the LED” evolves into “Alexa, ask the house to turn off all LEDs.”