Light on and off , between Cayenne app and momentary switch, for home automation by arduino

Here are some projects to get you started:

You can also go the route of a pre-built power strip and just send a high/low signal to it:
https://www.amazon.com/Iot-Relay-Enclosed-High-power-Raspberry/dp/B00WV7GMA2/ref=sr_1_fkmr1_1?ie=UTF8&qid=1486046540&sr=8-1-fkmr1&keywords=iot+power+strip

I have the power strip above, I’ll see if I can find some time tonight to get it working.