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Lighting my High School: Dead Ballast! Here's the Lighting in my Applied Math class (math in real-world situations, aka "math with a purpose" lol). This is one of the few rooms with a drop ceiling. Most have exposed ceilings but in some instances, the asbetos sound-absorbing padding was disturbed and a drop ceiling had to be added beneath it to trap any loose particles (so I was told). Anyway, there are three rows of lights, each with two 8ft tandem units and one 4ft unit on the end. The row with the dead 8ft section is in the center of the room. The 4ft section behind it is the single fixture and the fixture in the top right corner of the pic is another 8ft tandem. This wing is the original wing of the school (from 1956) so the original lights were probably F40T12 (I don't know if 8ft lamps were out yet). My teacher tried to get it fixed but he said the janitors changed the lamps and when it still didn't light they said "there's nothing we can do to fix it" so he left it at that. The school district's electrician has to come out and fix it (which will never happen) Keywords: Indoor_Fixtures

Lighting my High School: Dead Ballast!

Here's the Lighting in my Applied Math class (math in real-world situations, aka "math with a purpose" lol). This is one of the few rooms with a drop ceiling. Most have exposed ceilings but in some instances, the asbetos sound-absorbing padding was disturbed and a drop ceiling had to be added beneath it to trap any loose particles (so I was told).

Anyway, there are three rows of lights, each with two 8ft tandem units and one 4ft unit on the end. The row with the dead 8ft section is in the center of the room. The 4ft section behind it is the single fixture and the fixture in the top right corner of the pic is another 8ft tandem. This wing is the original wing of the school (from 1956) so the original lights were probably F40T12 (I don't know if 8ft lamps were out yet).

My teacher tried to get it fixed but he said the janitors changed the lamps and when it still didn't light they said "there's nothing we can do to fix it" so he left it at that. The school district's electrician has to come out and fix it (which will never happen)

PICT0166.JPG DSCN0967~0.JPG gol102514_024.jpg gol102514_003.jpg gol102514_002.jpg
File information
Filename:gol102514_024.jpg
Album name:Mike / Indoor Fixtures
Keywords:Indoor_Fixtures
Filesize:168 KiB
Date added:Oct 25, 2014
Dimensions:1501 x 1626 pixels
Displayed:214 times
Color Space:sRGB
Contrast:0
DateTime Original:2014:10:21 10:09:06
Exposure Mode:0
Exposure Program:Aperture Priority
Exposure Time:1/24 sec
FNumber:f/2.6
Flash:No Flash
Focal length:2.78 mm
ISO:100
Make:Samsung
Model:SCH-U380
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=18621
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Model25FanForever   [Oct 27, 2014 at 12:30 AM]
I can relate to this very well Laughing
streetlight98   [Oct 27, 2014 at 12:55 AM]
So far this is the only new fixture to have a bad ballast (new as in 2010, I think that's when these were installed). I've started to notice more and more dead tubes though, and I got to witness an EOL show on one of the hallway lights. The ballasts apparently do not have EOL protection so the dead tube was flashing all crazy purple-blue-orange-white colors and the good tube was lit. Now the dead tube is still dead (and you can see about 4" worth of blackening through the diffuser). There's no visible blackening on the lamps in this fixture so my guess is that they replaced the lamps and when it still didn't work they just shrugged it off and left it at that. The janitors can't do anything more than change the bulbs so they need to call in the district electrician. And who knows when that will happen.

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