Are you looking for RGBW smart light bulbs that work with Amazon Alexa or SmartThings? Here's the Sylvania Smart+ A19 LED Bulbs. They're smart light bulbs that could color your room white (2700-5600K) or any color that you can think of.
You can dim, tune, and control them from your smartphone. Or you can pair it with your Amazon Alexa or SmartThings device for further smart home automation. These lights can impact your productivity with their customized light settings. And because they're made of LEDs, they use 84% less energy and lasts up to 20,000 hours. For the price of a pair, it's a real steal.
Amazon users were mostly happy with these Sylvania lights as they're affordable, easy to setup, and readily works with common smart home automation devices.