One of the bits that was left over from the installation was an extra lighting module, which seems to be the same as the ones that are installed. It’s an L&S Nova Emotion, which it turns out has a bunch of features that are available with the matching driver.
Mine didn’t come with the matching driver.
Well okay it’s not that many features, but it has variable color temperature (and possibly brightness?), and Bluetooth remote control support, as well as touch control built-in.