Streetlight Wont work

I have made a simple light that turns on at night, the blueprint worked on 4.8 but now it doesn’t seem to work on 4.9. The light just doesn’t! turn on unless i click new viability which means its on constantly. Can someone help me make this work?

Try linking the Set Visibility node to event tick and see if that works. Then you can start figuring out what part of the event isn’t working. If the lights turn on then it’s something to do with the range.