Does this seem possible?
Thanks for your question!
This would be up to an electrician to determine, but if it works the same as any other light switch, then yes, it should work. I would recommend looking at some Alexa compatible switches like this, but please make sure you take the necessary precautions or engage with a professional before attempting any installation!
Once the switch has been installed, you can install the app from the manufacturer, enable the Amazon Alexa Skill from the manufacturer, give the Skill the necessary permissions, add it in your Alexa app, and turn it on or off using your voice!
Hope that helps!