You can control them all at once with Siri, since I set my 4 canlights up as a group. But in the Hue App, they can be individually adjusted. The Hue app is very smart and can be adjusted to match any picture/photo you upload...each light to a different color to make a scene you choose. For example one picture of the beach can have aqua, white, blue, green lights in my setup. Hopefully pic I’ve attached is clear :)