Have about 120 lights in the house, about 50 of these are philips hue. (I have two docks).
The phone app (iphone and ipad) cannot list (hangs) as soon as I turn on 30-40 lights and becomes impossible to maneuver on the tab that the lights are on (the tab basically only contains rooms and lights).
As long as all the lights are off, everything works as usual, but as I said, when I start turning on the lights, that tab is unusable and locks the whole app. Everything works as normal when I log in from my PC/s