A new cooling tower with aircraft warning lights found under Decor / Misc. Decor costs 0. The light in the lights, rotates.
You need Late Night and to place the package in both the mods/packages (Sims3 ) directory and in the "The Sims 3 Create a World Tool/ Packages" directory for the item to show in your game. There is an earlier post explaining how to install items in CAW.
Importing packages into CAW
Cooling tower with aircraft warning lights (MediaFire)