You can use Lifelong Smart Home App to control smart lights, smart plug etc smart device in your house by voice.
Lifelong Smart Home app could control and scene your smart devices at home
* Ok Google, turn on kitchen light
* Ok Google, turn off kitchen light
* Ok Google, dim livingroom light
* Ok Google, brighten livingroom light
* Ok Google, set the livingroom light to 20 percent
* Ok Google, set bedroom light to Blue