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Form 400 on Elston Ave At one time the most common luminaire on Chicago's streets until the Crimefighter Invasion of 1977. Keywords: American_Streetlights

Form 400 on Elston Ave

At one time the most common luminaire on Chicago's streets until the Crimefighter Invasion of 1977.

IMG_5721.JPG IMG_5720.JPG DSC07693_a.jpg HPIM0436.JPG P9102992SBW.JPG
File information
Filename:DSC07693_a.jpg
Album name:regennis / American Streetlights
Keywords:American_Streetlights
Filesize:60 KiB
Date added:Sep 11, 2011
Dimensions:816 x 544 pixels
Displayed:85 times
Color Space:sRGB
Contrast:0
DateTime Original:2011:07:11 14:22:46
Exposure Bias:0 EV
Exposure Mode:0
Exposure Program:Program
Exposure Time:1/640 sec
FNumber:f/5.6
Flash:No Flash
Focal length:17.9 mm
ISO:80
Light Source:Unknown: 0
Make:Sony
Max Aperture:f/2.7
Model:DSC-H9
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=8360
Favorites:Add to Favorites

Comment 1 to 4 of 4
Page: 1

streetlight98   [Sep 11, 2011 at 02:14 PM]
Did they ever make a crimefighter version of the Form 400 and 175?
GullWhiz   [Sep 11, 2011 at 02:15 PM]
No....The first one was a GE M-250R in MV, they are basically cobraheads with a bucket refractor....

The smaller versions used the same bucket refractor most commonly used on the NEMA heads...and the bigger versions used the same refractors found on 400 watt Powerbrackets.....but both as in closed bottom instead of open bottom..
streetlight98   [Sep 11, 2011 at 02:21 PM]
Were the lenses glass, plastic, or both?
GullWhiz   [Sep 11, 2011 at 04:34 PM]
I believe the older ones were glass...but the newer ones all are plastic.....

Comment 1 to 4 of 4
Page: 1
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