How to Use a Smart Plug as an Outdoor Light Timer Here’s how to set up your smart plug as an outdoor light timer in three simple steps.

To use the iPhone's sleep timer, set a time in the Clock app's timer, and set the When Timer Ends option to Stop Playing.

Basic plug-in timers cost $10–$20 each, and the cost of a programmable thermostat starts at $50." You can find many programmable thermostats across different retailers.