Trying to sort out what is good for this application.

Parking garage and Colonnade area. We have the ability to put in ceiling type speakers, 70v system. Should be approximately 30+ speakers.

Need weatherproof, round speakers with back boxes.

Have used Tannoy in the past, but found they discolor a little too quickly.

Anyone here use or know of something I should be looking at as an option?

What is the desired use? Paging or music? Higher end or just needs to function forever? Budget range? I've actually used a very good competitively priced Bose product here in the past ( I know, but at a good deal they are not junk) for a lower end place. I also like Community speakers for stuff like this, though I'm out of date on their current offerings.

30 plus speakers indicates you are trying to have moderate volume out of each one.

If these speakers are not in direct sunlight, that will help no matter what brand you get. They will fade due to pollution, dust, etc.

JBL Pro control 24ct in black would potentially work.

Need more info. The problem with many questions posted online is analogous to google vs. the librarian. Google will find you thousands of answers; a librarian will find the right answers.