How do I control the lights with Google Home?

You can tell Google to turn lights on or off by their names as given in the Collingwood app, so for example you could say 'Hey Google, turn on the kitchen light'. You can also dim the lights by giving a light level, either as a percentage or using terms such as 'half' or 'quarter', for example: 'Hey Google, dim the kitchen light to half', or 'Hey Google, set the living room to 30%'.