The red "dots" were stars. They were supposed to look Hollywoody. That particular 70s-style of electrolier head was called a "bathtub". Each is 5 feet long.
Thank goodness they've been replaced, but, unfortunately, not by the originals (I notice the one lamp there on the right is trying to skedaddle):
gsv
"The Art of Street Lighting in Los Angeles" (1972) by Eddy S Feldman is full of
good info