Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the streetlights-l group. File : /Another...
streetlights-l@yahoog...
Jun 2, 2004 8:02 pm
3242
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the streetlights-l group. File :...
streetlights-l@yahoog...
Jun 2, 2004 8:06 pm
3243
This site goes into detail on all aspects if street lights, city specs, general info, and more! Our public forum has just started, so get posting! (Photos and...
Hi, folks! I was in LA for a few days over the long weekend--so here's my report. Hollywood Blvd: Looks like work is finally starting! Four poles have been...
Enter your vote today! A new poll has been created for the streetlights-l group: What kinds of mast arm hold up the street lights in your hometown? o Davit o...
streetlights-l@yahoog...
Jun 8, 2004 4:03 am
3246
When I go on the interstate at dawn or dusk, I notice that the lights come on and go off in groups, as opposed to one at a time like on regular streets. Plus,...
I used to wonder the same thing....then I found, usually near off ramps/interchanges, there would be a large grey metal box with a photocontrol in a wire cage...
I've seen the same thing around here--the neighborhood cobras (70 or 150 HPS) are individually controlled and come on whenever. But the arterials, downtown...
That reminds me of an incident a few years ago. I was hosting a visiting delegation from a major German lighting company visiting us in the UK. I was driving...
Years ago I had occasionally seen streetlights come on in groups as opposed to one at a time or all at once. I didn't give it much thought until I examined...
In Roswell, NM, all of the Main ST. and Second St. lights are controlled using photo cell/relay box combinations. In Mesa, AZ, I have seen where a smaller...
I was on a main road through a Pittsburgh, Pennsylvania suburb, and I notice that there are a few street light poles intended for cobra heads, but I notice...
Hi! I am thinking that the area you were talking about was between McKeesport, PA and Glassport, PA off of the W.D. Mansfield Bridge. If it is, I know what you...
One possibility is that the lights were removed, but they just haven't got around to removing the poles yet. When the DOT here in Washington reduced the...
I was working a rib festival in the neighboring county, and on the fairgrounds I found a few cobra heads that are mounted on mast arms that are rare. The arms...
when did they 1st come about? i know in Chicago they began installing them in 1974. don't know how long it took the city to complete the project. what i wonder...
Mike, I think you are pretty well correct on the mid 70's for Sodium bulbs. In my hometown on Long Island, our street got them in late '79. I have lived in...
GE introduced the high pressure sodium lamps around 1965. The first installations I ever saw, in downtown KC, MO and Seward, NE were in 1967. They took awhile...
Hello to all..... while on the subject....... I managed to pick up a late model GE M-250 (M-250R2?), just to tinker with and have a chance to try out my new...
FARMER1419@...
Jun 30, 2004 11:49 pm
3260
There used to be an "HPS servicing guide" on the Thomas&Betts web site that described how the ignitor actually worked. From my observations, the ignitor...
Do you know of any links that do describe how the starter works? I just find this so interesting, and I would like to know how it works. I know that the...
No links that I know of but I do know how the starters for HPS and Pulse Start MH work. They are also sometimes called igniters and they actually don't do much...
Actually it was the early 1960s, like 1962, when GE made pre-production versions of the HPS lamp and had limited use. I think they became offically available ...
sorry for the confusion, everyone, I meant to type my DVOM **COULD NOT** read those high pulse-start readings. again, sorry for the confusion, and thanx for...
FARMER1419@...
Jul 3, 2004 2:17 am
3265
Lee, great explaination. although i am not familiar with electronic terminology, i understand the princibles of a diode, and capacitor, however, triacs, and...
FARMER1419@...
Jul 3, 2004 2:32 am
3266
Hello, Along with streetlighting, another fascination I have always had is power distribution. Ever since i was very young, i always had an idea of where we...
FARMER1419@...
Jul 3, 2004 2:37 am
3267
As for the higher wattage HPS lamps and the capacitors that are part of the circuit, they are there for two reasons. One is to correct the power factor of the...
Hi Keith, If you go to: http://www.insulators.com You will find links to various power distribution sites as well as neat in-service photos, etc. As far as I...
Hi again Keith and group... I have absolutely been intrigued by overhead power distribution lines (and telephone/telegtaph lines and so forth!) since the 1950s...
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