I noticed these RGBW WiFi light bulbs from Homeylux when searching for 'cheap' RGB smart bulbs: https://www.into-led.com/nl/set-van-6-e27-smart-led-lampen-rgbww-493445.html?gclid=CjwKCAiAq8f-BRBtEiwAGr3DgcQvwDoisgNT87x6DZ-x7FA8BegOUj3NZb-mMRAot1joVCP3NC3NCBoCj04QAvD_BwE These are fairly cheap, about ...