This one did my head in when I first encountered it.

Physical objects such as extrusions, sweeps etc in the light fitting family would be obscured by the floor object between your second level and the first floor below, as you would expect. However as you are using symbolic lines in your plan representation (nothing wrong with that) they do not get hidden by the elements in between. If they are within the View Range, they will be seen. My understanding is that your options are: you can turn the sub category off; set your project view's View Depth to ensure it does not go down as far as the light fitting; or create a Plan Region to do the same thing for a portion of the plan extents.

If for what ever reason you cant just turn off all the lights through visibility graphics, you could create view filters that look at the level the light is on just turn off the rest:

light filter.PNG

Thank you for the tip, Alex.
It would be even better if the filter could allow us to Filter By the Associated Level (the way the View Range setting does) rather than just on the element's Level. That would make a filter more universally useful.