Here was the 70 watt HPS 113 that used to light my father's road in Easthampton, MA. This has now been replaced with LRL's 44 watt SAT-24S in September 2011
Those 113 had very strong reflectors. A 100w one will light the ground as well as a 150w GE or Cooper cobrahead. They don't seem to have early lamp failitures either.
The model 25 I just acquired was made in 1983 and has been in service ever since about that time! Up until this month I think, dnd everything still works today! Then it was taken down for a project on I-70 where they are adding an exit.
But, Today's fixtures CAN last 20-30 years, it just depends on what the linemen use, the lamps, the photocells, and the quality of the fixture, like a GE M-400 R3... That could last a well long time without servicing if you use a good lamp.
Fixtures back then have had problems like that before! I Bet some of the model 25's or 113's have been put in service and only lasted like 3 years before burning out. And others 20 years! It actually varies.
we change out more M-250R2s too, but that's because we have more GEs in our system. It seems like National grid doesn't replace ignitors because when a light goes out without it cycling at all (usually the ignitor), a new fixtures seems to typically find it's way to the mast arm.
It seemed Xcel energy replaced the ignitors in old AE fixtures without REMOVING the old ignitor and just letting the new ignitor hang loose in the fixture not attached to the housing at all. Both my 113 and Model 25 had this case. But they weren't plug in ignitors they were just screwed in directly.
The old ignitor on the Model 25 worked but not sure about the original ignitor of the model 113.
But they guy on the truck did say the GE's were a better quality than the AEL's. And that is so true.
But, Today's fixtures CAN last 20-30 years, it just depends on what the linemen use, the lamps, the photocells, and the quality of the fixture, like a GE M-400 R3... That could last a well long time without servicing if you use a good lamp.
Fixtures back then have had problems like that before! I Bet some of the model 25's or 113's have been put in service and only lasted like 3 years before burning out. And others 20 years! It actually varies.
The old ignitor on the Model 25 worked but not sure about the original ignitor of the model 113.
But they guy on the truck did say the GE's were a better quality than the AEL's. And that is so true.