Here was the 70 watt HPS 115 that used to light my father's road in Easthampton, MA. This has been replaced with LRL's 44 watt SAT-24S in September 2011.
yes they did test them and there going ahead with the swap over. yes they just put this light up last year but the city of easthampton owns all its lights so NU does not maintain them. I have one of these arms in my collection. There is a "JNY" stamp on the arm leaving me to believe they were made by Joslyn.
I know BGE did try some lights...and as far as I know, they aren't satisfied, they dim out too fast and have some flaws.....