Yellow light not white


#1

Good morning, I bought some white Yeelight spotlights (bulb) on the Amazon, but when they were installed, they were yellow in light, how can I make the light white since in the application I could not find it to make them yellow,
thank you very much


#2

The bulb have color temperature of 4000k, which is a litter warm. So what do you mean they were yellow?