Can't turn off nor modify SpotLight

I’ve just created a simple desk lamp, gave it materials etc. and made an actor class blueprint with it for a nice switch on/off action. The problem is, I can’t find a way of switching the SpotLight component invisible. I can’t even control the light intensity or cone width within the blueprint’s editor viewport. I also get the red cross light bulb inside the blueprint’s viewport, in spite of no other lights being in the scene. Is it a setting somewhere? I will provide any screenshots necessary, for now I share my youtube video.


Edit: Yes, I set the lights to be dynamic.

To turn a light on or off (enable, disable it) use the ‘Visible’/‘Set Visibility’ options. The ‘Set Active’, ‘Auto Activate’ settings have no effect.