Not the cheapest ever but the cheapest for now.
Others
https://www.zapals.com/catalogsearch/result/?cat=0&q=xiaomi+…
e.g. Yeelight 16.5 USD
Not the cheapest ever but the cheapest for now.
Others
https://www.zapals.com/catalogsearch/result/?cat=0&q=xiaomi+…
e.g. Yeelight 16.5 USD
Not sure, but you can control them direct from the Mi Home App over wifi without needing a gateway/hub.
Can control with gateway and internet access disabled on gateway and light but local lan enabled or use home assistant.
These won't work with yeelight app or google/echo
Postage is US$2.48 on these
Will these work with Google Home or Apple Home Kit?
Nope and you need to spend more for home kit support
You can get them to work with Apple HomeKit if you use the free 3rd party HomeBridge application (plus the Yeelight Homebridge plugin), which runs on a server on your network ($25 Raspberry Pi Zero W works well). Its a bit tricky to setup but works well once you've done it. I'm using the Xiaomi RGBW bulbs this way.
Only 450 lumen max.
Can you control this direct over wifi, or does it all go via a server in China?