Fluorescent street lights of the 1950s and 1960s generally employed a mogul bi-pin lamp. If I remember correctly the code for the lamp was F90T17 and I think...
I believe these lamps were originally run at 1000ma in outdoor streetlighting units, despite their 800ma rating. The lamp ran at 100-watts at 1000ma and at 90...
Dear Eric, The hot restrike time of Ceramic MH does indeed preclude them from road lighting so far. One Japanese firm makes instant restrike 350W Ceramic MH...
... 350W ... How about a fan to cool the luminaire in the event of a momentary power outage? Or would the arc tube itself still retain too much heat? Another...
The only problem I see with a fan is the maintenance required for a "mechanical" item. A fan isn't a reliable cooling method in a luminaire, especially in an...
Hey Kevin! I would like to agree with you about not putting a fan to cool down the lamp. Even though this does mean a longer time in the dark, spikes causing...
James: Our (Holophane) Prismatron ballast continues to gain popularity in the lighting community and industry. It can drive either (1) or (2) 400, 350, or 320...
... dark, ... luminaire, ... Perhaps not, though remember that the only time the fan would ever run is if there's a momentary power outage and then it would...
... 400, ... lamp ... board ... perceptible ... More important in this situation it would seem is lamp life, typically if you run a MH lamp below it's rated...
James: Lamp efficacies will always drop when they are dimmed. However, there is a large and growing market where the end-user's buying motive is energy...
On the subject of white light, one of the 3-globe fixtures along 1'st Ave in Seattle has some white lights now. It's the 1'st one north of the NE corner at...
LB: Yes sir - the city is testing induction lighting for Pioneer Square. If you want to see more, go to Occidental just North of Jackson. 4 of the poles have...
I was in an IM conversation recently with someone regarding the mushroom lights he was after... but can't remember who it was. I said I thought there might be...
I still haven't been able to find any information on the mushroom lights. Like what company made them or what they are actually called? Any new information...
... It looks like the city looked at the cool-white experiment and gave it an F. Someone here has corresponded with the utilitie people. Whoever you are, maybe...
Billy: Not so... Go east a few blocks. Check out Occidental Ave. north of Jackson St. There are FOUR poles equipped with white light, being tested. I...
Hello all, Have a simple question about a cobrahead lamp: If it has a plug in ignitor, it's a HPS lamp, right? Don't think I've ever seen a merc lamp with an...
Mercury lamps don't need ignitors. They can run on a simple core and coil. But the larger wattages usually use a capacitor to increase the power factor. ...
... I would say (very roughly! :) ) 99.8-99.9% chance it's HPS, .1-.2% chance it is a pulse-start metal halide. Check the numbers on the lamp and the ballast....
Don Klipstein
don@...
Aug 16, 2004 6:15 pm
3377
I entered Pioneer Square today and found those four white lights that were being talked about. And they are still on by day, as are a bunch of orange ones...
Yes that is correct, only HPS and pulse start MH lamps have external ignitors that are hooked up with the ballast and capactior. Mercury vapor lamps only ...
Of interest, a couple years ago I acquired (from a utility boneyard) a GE M-400A2 that was manufactured as a 400 watt HPS luminaire. When it was installed...
Funny...two of my MH lamps (one pulse start, one conventional) operated on their correct MH ballasts take a long time to do strike after the power is turned...
The Cooper-Hewitt lamps had a large pool of mercury at one end that also acted as one electrode. When tilted, it would run from one end to another, momentarily...
A friend of mine was discussing about some really early "fluorescent" fixtures he saw in photos with Model As, etc. He added that they required to be tilted to...
... that ... bunch ... with ... 3000k is pretty far from the 1700k or so that HPS works out to, to me it looks not orangish at all, but a bit of an ugly...
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