Yeah, where I grew up there were many incandescent GE 109s along the two main roads throughout the city (Brockton, MA) and at many intersections too. Very few were MV. A neighboring utility used a fair amount of MV From 109s (no incandescent ones) and those were my top favorite to look at, especially at night! There was one with a clear 400W lamp in it that was in service for the longest time! It was on the way to my grandparents house two towns over and it was a real delight to see it illuminated with its crisp mercury light coming through the Form 109 optics! 
As usual I learn something new on LG.
I didn't know that the 109s were available in incandescent as well, I thought just MV.
Interesting story about the ones in your area.
I'm sure glad you were there when they were in service so we can hear about them today.
Anyway years ago I remember seeing a large number of Form 109s in Georgia, in particular Atlanta, Conyers, and Covington.
Some had coated MV lamps and others were clear.
These lights... I don't know just have a character all their own and the MV light just completely relaxes me.
Those 109s gave those cities lighting that can never be replicated.
