How do I remove a lighting effect?

Hello,

I am making several corrections to an airport and one of the tasks is to remove the default lighting beacon object. I removed the object using an exclusion rectangle, but the light persisted. How can I remove the beacon completely with the light?

The lighting effect is actually removed together with the beacon. It appears to be a scenery editor glitch. When the scenery is compiled and loaded into the sim the effect is gone.