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GE M400 400W MH Streetlights

GE M400 400W MH Streetlights

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In Sunnyvale, CA.

IMG_0562.JPG IMG_0501.JPG IMG_0463.JPG 20180929_183652[1].jpg

Light Information

Light Information

Manufacturer:General Electric
Lamp Type:Metal Halide
Photocell Type:Twist-Lock

File information

File information

Download: Download this File
Album name:High Intensity / Damaged Lighting
File Size:459 KB
Date added:Feb 17, 2019
Dimensions:2464 x 1848 pixels
Displayed:74 times
Date Time:2019:02:10 03:47:31
DateTime Original:2019:02:10 03:47:31
Exposure Bias:-0.333333333333 EV
Exposure Time:1/800 sec
FNumber:f 5
Flash:No Flash
Focal length:24.227 mm
Model:Canon PowerShot SX420 IS
White Balance:0
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Mike McCann

GoL Mike McCann 88219189@N04/albums
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Feb 17, 2019 at 08:41 PM Author: streetlight98
These are actually GE M-400s. They are the sister model to the M-400A Powr/Door, but these have the ballast installed in the top housing, meaning the "A" designation doesn't apply. These were used widespread here in the 70s and early 80s for 400W MV lights and in the early 80s for 250W and 400W HPS. Nice quality lights. Seeing that these have NEMA tags and shallow glasses, I'd expect them to be late 70s. I believe the deep glass was used predominantly in the 80s, although they did flip/flop between the two from the 60s to the 80s. Same for the M-250 glassware, until they introduced a totally different glass around 1991 for the M-250A2/M-250R2.

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Rare white reflector

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Feb 18, 2019 at 03:16 AM Author: Silverliner
The ballast clearly looks like an aftermarket replacement. Probably converted from mercury or HPS to metal halide at some point. The split door M400s were notorious for losing their ballast access doors.

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