Conditional Statements for Yes/No Visibility

Problem:
You have a light family which has two options, suspended or ceiling mount. So you make a Visibility Parameter for each objects, the suspension wires and the mounting bracket. Problem is you don't want to see both at the same time.

Solutions:
In the Formula field of one of the Yes/No (Visibility) parameters type the following:
not(suspension wires)

So to translate this; turn off the mounting bracket if the suspension wires are on.

Thanks to AUGI users...
http://forums.augi.com/showthread.php?t=79394