I have always used brass LGB, Aristo or USA track using track power on the 4 outdoor layouts I have built. I have the opportunity to buy some stainless track for the outdoor layout I am building around the pool that I am building in at my new 2nd home in FL. I am using track power and brass track power at my home in the rocky mountains in Utah by the ski areas and it works quite well. I have been told that the sun in FL makes it hard to use track power successfully but in Utah we live at near 7000 feet and the sun is very hot too. Anyone have any experience with both and insight?