Visible option in Viewport doesn't work?!?

Hey Guys!

I just wanted to create my first blueprint class(I am new to UE4) and wanted to do a toogleable light.
So I placed the Light in the Viewport and tick off the “visible” oprion. But when I play it is still visible.
Also I can’t change the visibility with the “toogle visbility” function in the event graph.
What am I doing wrong? I have followed the tutorial by UE:
step-by-step and it still isn’t working.