Ahh, sorry, I just got what you were asking. My cognitive skills are uber crap at the moment. 

If you're using Studio 4, you can use the search function, type in 'mesh' and a result with the mesh lights with pop up. It may be 'hiding' in the Daz Studio section of your content file tree/window, depending on what your interface has. Look for the reality Reality folder, then lights, or props for water.  

I do apologize for confusing you. My fumes are a bit low... 

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