Best Buy offers the Belkin Wemo Smart Dimmer Switch for $49.99 with free shipping. That's tied with our expired mention from two days ago as the lowest price we've seen. (It's the best deal now by $21.) It replaces your single-pole light switch and allows you to dim and turn lights on and off remotely via the Wemo app for iOS or Android. Features include 802.11n wireless, a night mode setting, and voice control via Amazon Alexa or Google Assistant.