Adjustable colour temperature from bright crisp white to warm soft white (2200-4000k) as-well as the dimmer level.
These bulbs work as normal on a standard on/off wall switch with the additional ability to adjust the colour temperature and brightness from the app.
The Calex Smart app can be downloaded from the Apple App Store & Google Play store for free.
Connects directly via WiFi - no hub required. Not compatible with dimmer switches.