I have 4 lights in my livingroom. These lights were set-up with the Philips Hue app and connected to OpenHab with the hue binding.
After that i created 4 “Things”. The strange thing here is that the channels are everything but ON/OFF. I have options like: Color/Color Temperature/Alert/Color Loop. I choose Color.
These extended color lights have only two channels. You should add multiple items, like Dimmer, Switch etc. (see also binding docs) to get them to work as expected.