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Two Josyln Frederick Streetlights Here you see one bigger Josyln clamshell and one smaller one. Note the bigger one has a remote HPS ballast with an ignitor on the bottom brace near the bracket. This one highly likely has a Sylvania Standby HPS lamp The smaller one shown here still has the mercury vapor ballast however it is lamped with a retrofit HPS lamp for mercury vapor ballast! I was told they did a lot of retrofitting with HPS in Frederick MD in 1995! Keywords: American_Streetlights

Two Josyln Frederick Streetlights

Here you see one bigger Josyln clamshell and one smaller one. Note the bigger one has a remote HPS ballast with an ignitor on the bottom brace near the bracket. This one highly likely has a Sylvania Standby HPS lamp

The smaller one shown here still has the mercury vapor ballast however it is lamped with a retrofit HPS lamp for mercury vapor ballast!

I was told they did a lot of retrofitting with HPS in Frederick MD in 1995!

CIMG3578.JPG 003~2.JPG FrederickJosylnclamshells.jpg HPIM2894.JPG 1-31-11_020.JPG
File information
Filename:FrederickJosylnclamshells.jpg
Album name:Jace the Gull / Clamshells in Service
Rating (1 votes):55555
Keywords:American_Streetlights
Filesize:425 KiB
Date added:Feb 13, 2011
Dimensions:1500 x 2000 pixels
Displayed:210 times
Color Mode:Normal
Color Space:sRGB
Contrast:Standard
DateTime Original:2010:11:22 14:05:36
Exposure Bias:0 EV
Exposure Mode:0
Exposure Program:Program
Exposure Time:1/500 sec
FNumber:f/5.6
Flash:No Flash
Focal length:14.7 mm
Focus Mode:Auto
ISO:80
Light Source:Unknown: 0
Make:Panasonic
Max Aperture:f/3.3
Model:DMC-ZS5
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=5031
Favorites:Add to Favorites

Comment 1 to 11 of 11
Page: 1

Form109   [Feb 13, 2011 at 08:00 PM]
now this is an excelent shot right here!...how cleaver of them to keep their old fixtures and re-use them converted to a modern light source,wish more places did something like this,even though its probably less hassle to just change fixtures,especially in large cities.
Silverliner14B   [Feb 13, 2011 at 11:24 PM]
Very cool pic. These operate on a series circuit with remote isolation ballasts on the crossbars. Square ones are indeed newer, I have seen them here in Southern California.
GullWhiz   [Feb 14, 2011 at 04:52 AM]
Yes sure those are indeed series! I have seen firing up and they fire up the same time in the row of fixtures! There are some that still has MV lamps too...and the gumballs were still incandescent until 3 years ago they were converted to HPS with HPS ballasts.
rlshieldjr   [Feb 19, 2011 at 03:37 AM]
Can you get a pic of the regulator and controll gear?
GullWhiz   [Feb 19, 2011 at 04:35 AM]
Ill try next timeI go to Frederick
streetlight98   [Feb 19, 2011 at 10:27 PM]
THey don't retrofit here. New fixture this... New fixture that... Crying or Very sad
GullWhiz   [Feb 19, 2011 at 10:36 PM]
Frederick is a historical downtown.....there's some strict rules for the downtown Frederick area.....one of them includes what type of windows on front of building (most are actually orginal or a production withj only one pane windows!
mercuryvaporrocks   [Feb 19, 2011 at 10:40 PM]
I've seen older streetlights retrofitted to metal halide in parking lots.
GullWhiz   [Feb 19, 2011 at 10:57 PM]
Those lights, are powered by Allenghny power!
joe_347V   [Feb 20, 2011 at 05:42 AM]
Nice shot of some nice clamshells, I kinda wished that Toronto had retrofitted their clamshells (or at least some) when they changed out to HPS but I'm pretty sure they retrofitted some older MV cobraheads to HPS though.
Silverliner14B   [Feb 20, 2011 at 06:05 AM]
To find the regulator, just follow the street lighting circuit. The Joslyn in the back is at the end of the street lighting circuit so that would be a good place to start. Be prepared to walk for a couple blocks or so. A series regulator will look like a transformer supplied directly by the primary lines, but it won't be powering buildings, etc, just the street lighting circuit. Next to the regulator should be a smaller device called the oil switch. Good luck!

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