Is that a Model 13 I see behind the GE M-250?

Yeah this is almost the same situation as our CGE 8-8-8's. Toronto no longer has any but Brampton and Mississauga are the only cites in the GTA that still have a few.

Personally, I could care less about street lamps; however, since this website revolves around the interest of those, I understand and respect the interest.

Regarding 8" heads, New York City is one of a handful of cities (as I would imagine) that continues to install 8" traffic signals. This is understandable since the speed limit on many thoroughfares is 30 M.P.H.

Looks like the M-250R2 is the only light that isn't a model 13. Why are the green and red lamps lit in the 2-section signal? Is that an older form of "yellow" light?

The red and green signal indications both lit was an old representation of the amber signal indication, in which many New York City motorists were familiar with for a long period of time. Normally, the overlap (as this old form of caution is known as) lasted in between 1 to 3 seconds prior to when the green signal indication terminated. The intention was to improve a motorist's initial reaction, so that he or she could come to a full stop safely without the risk of an accident, in which was successful at the time of its introduction in New York City in the year 1952. As a result, traffic signal controllers citywide were readjusted to operate the sequence.

Prior to the overlap, the original form of caution was what is known as the "dark out period," and, basically, both signal indications appeared unlit for typically 3 seconds (the maximum) prior to when the red signal indication then appeared illuminated.