Toggle switches with the Hue wall switch module are theoretically possible - Hueblog.com
Amazon.com: Philips Hue (1) Wall Switch Module with (2) Smart 60W A19 LED Bulb, White and Color Ambiance Color-Changing Light, 800LM, E26 - Requires Bridge - Works with Alexa, Google Assistant and
I want to connect this wall switch module onto the app however I can't find the serial number. Help! : r/Hue