I've only seen two MV M-250R2s and they were 100W. One was in Newport and the other was in Seekonk in the middle of nowhere. The latter has been dayburning for as long as I've been around and it still works!
in 2006-2008 the newest fixtures for GE M-250R2 MV were 100 watt and 250 watt, but the 175 watt MV at that time were AE 115s only. The 400 watt MV GEs in 2006-2008 in my area were GE M-400R3 and the 1000 watt MV were AE 327s.
The last mercs here were in the early 90s. They were 100W MV T&B 113. Ironically at the same time, HPS fixtures were being used too so a new neighborhood may get 100W MV T&B 113s on one street and 50 or 100W HPS M-250R2s or T&B 113 on the other. I don't knwo of many MV 113s left here. I know of two so I'm guessing a few years later they were changed out with HPS fixtures. The M-250A2 FCOs were the last really common mercs here and they still are pretty common. The M-250A2 FCOs and bail latch M-250Rs are the msot common mercs here.
Duquesne Light used the OVZ for 175 watt and 250 watt MV (1993-2005), the M-250R2 (1980's-2003) was also used for 250 watt MV occasionally. The OVX was used for 400 watt MV (1993-2005). In 2006, Duquesne light stopped installing mercury vapor replacements. They also stopped relamping mercury vapor streetlights in 2009.
West Penn Power used the OVZ for 175 watt MV and 250 watt MV (1999-2008), they used the OVX for 400 watt MV (1996-2008), and the OVL for 1000 watt MV (1999-2008). West Penn Power stopped installing mercury vapor replacements in April 2008, they still relamp mercury vapor street lights occasionally as needed.
I've only seen two MV M-250R2s and they were 100W. One was in Newport and the other was in Seekonk in the middle of nowhere. The latter has been dayburning for as long as I've been around and it still works!
West Penn Power used the OVZ for 175 watt MV and 250 watt MV (1999-2008), they used the OVX for 400 watt MV (1996-2008), and the OVL for 1000 watt MV (1999-2008). West Penn Power stopped installing mercury vapor replacements in April 2008, they still relamp mercury vapor street lights occasionally as needed.