light visibilty pref changes by itself

[jeffroyer]

On any given day I find that the preference setting for visibility of lights changes on its own. Not a huge problem except for when I leave the computer to handle a long render and come back to find wireframe lights everywhere. Does anyone else have this problem?

[Don@Black Dog]

I have found that also, when you place lights that have an output characteristic. It often changes the scene to reflect their output. This is a pain if you have not given all the lights some output. It may be better to render without the fixtures. Anyone else have a suggestion, such as how to turn off the lighting while keeping the fixtures for modeling?