Although they are expensive, smart LED light bulbs allow you to do fancy things like changing your lighting color via wi-fi control, for example. Good smart LED light bulbs are also compatible with multiple smart home systems, such as Apple’s HomeKit, Samsung’s SmartThings hub, Amazon’s Alexa, and Google Home. 

Keep in mind that a smart bulb wouldn't instantly dim via an app. There is a couple of second delay. Besides, people without a smartphone will find smart bulbs pretty useless.

The best smart lLED light bulbs for normal use: Philips Hue White and Color Ambiance A19 – Gen 3 (actually a system, app options, compatible with all smart home systems)

The second best smart lLED light bulbs for normal use: LIFX Gen 3 (brighter colors, no need of a hub)

The best affordable smart LED light bulb: GE C-Life (easy bluetooth control)