The Sure Petcare integration provides a binary sensor for the hub, which has an attribute led_mode. This is settable via the sure app, but is probably exposeable within home assistant as a service like set_pet_location
Values seem to be:
0 Off
1 Dim
4 Full
(2 and 3 may be intermediate states not exposed by the manufacturer, but I have no way to test.)
It would be useful for me tor the ability to toggle this attribute could be added via a set_hub_led_brightness service. The hub has to be in our living room, and the ability to turn the lights off while watching a film is useful, but for diagnostic purposes it’s best in general if they are on.