You can control Philips Hue lights multiple ways — that's one of the reasons they're so smart! How you control your lights depends on whether you have a Hue Bridge.
Without a Hue Bridge
Certain Philips Hue lamps and light fixtures come with a Dimmer switch, which can be used out of the box to turn on and off the lights, dim and brighten, and cycle through four preset light scenes (if purchased with a White ambiance bulb). If your lamp did not come with a Dimmer switch, you can only turn on and off the light.
With a Hue Bridge
If you pair your lights with a Hue Bridge, you can then operate all your lights within the Hue app. The Hue app offers far more functionality, allowing you to set up the Home & Away feature, create custom light scenes, and more. You can also use a smart home assistant to control your lights with your voice.