Alexa Voice Shopping Deal only (link is to show product only, do not order through link)! Amazon has the Kasa KL135 Smart Dimmable Color Changing A19 Light Bulb for $4.99 with free shipping on $25+ or with Prime when you follow this instruction below:

Using a device with Alexa, say, "Alexa, order a Kasa Smart Bulb." Alexa will add it to cart, then tell her to "Buy it now."