Very cool Carl. I use 1000W lamps on my reef but have yet to measure PAR. You are a brave soul having an open unfiltered air in Venice Beach. I suppose that is better than inland though. I just remember there always being some sort of greasy soot on my windowsills when I lived in Beverly Hills, but I was in the flats near a higher traffic area.
My cousin has a cool place down there as well. Donn Hoffman...built a radical cement & steel house in a rough area that I am sure has completely changed in the last few years. Is Great Western Steak & Hoagie still running? Man I used to LOVE those!!