Suggest to add a white color controller into the L2 NS Panel widget, similar to the one in ewelink, where you can control RGB settings, brigthness and cold / warm white as well.
This will help to use the combination of NS Panel / L2 controllers in real use case scenarios of home automation. Until the NS Panel the L2 controller was nos suitable for high end homes for lacking a good human interface controller.
NS panel can become that suitable HMI, but it falls short for not being able to manage white color settings for the L2 RGB controller, while it is nice to choose from different scent colors, most of the time you would prefer white light
Strangely the HUE lamps NS Panel Widget has the capability.
If you agree, please Like the idea to help support the suggestion !