That would look so cool to see a high mast fixture with like 5 or more 180w LPS fixtures. Do or have they existed before? Any pics if so? Thanks

Yes there was, after doing some searching I found this but you have to scroll to the very bottom of the page to see it.
Before the photo of the high masts, there is some history and explaining about the lamp and it's efficiency.

Wow that looks awesome!

I found another picture of one:



It's the very last link on this site.

I’d love to install one of those in my backyard