Does anyone have experience with this?

For some reason I can't see any light markers, all the other markers work just fine except the lights.

When dragging the lights into the render window they do light up the place where I placed them but because I can't select them I am unable to edit them afterwards which is really annoying considering the fact that ím working on a big cave and Skyrim for some reason has issues with 5 lights lighting up an object while it's predecessor Oblivion on the other hand didn't have these issues.

Removing all my ENB files doesn't help either and I don't want to reinstall the Creation Kit because the last time I did that Todd Howard thought he was funny and all my Skyrim files got deleted.

So would anybody know what causes this? Thanks in advance.

Press m two times; the first time to make all the markers disappear and the second to have them all reappear.