Is there a limit to the number of shadow producing lights you can add to a scene? I'm attempting to do a scene in a warehouse where lights turn on in a specific pattern/order revealing different sections of the room. There are 9 overhead spots in all. But after I loaded about the fourth or fifth one, the previous lights went out.

To be clear, it renders fine. All the lights show up just as they are supposed to. But working on the scenes (editing), I have to reselect each light to turn it on to work on that section, and that causes some other light to go out. This means when I load to the scene to edit it, I often find it nearly pitch black until I select some light to turn it on.

It seems very strange.

Thanks to anyone who can help!