Amazon offers the Sylvania Smart+ ZigBee Indoor Flex Strip Starter Kit for $33.62 with free shipping. (Home Depot charges the same.) That's $2 under our April mention mention and the lowest price we could find by $7. It includes three 2-foot flexible RGBW strips and is compatible with SmartThings and the Amazon Echo Plus.

Note: The ZigBee Certified Gateway hub is required for this these lights to work but not included.