Dead lamps/ballasts - Odd Sylvania 175W cram failure

File information
Filename:	20130810_102451_zed20130812_180510_90p1587495650.jpg
Album name:	A_lights / Dead lamps/ballasts
Keywords:	Lamps
Filesize:	308 KiB
Date added:	Aug 12, 2013
Dimensions:	1499 x 1999 pixels
Displayed:	129 times
Light Source:	Unknown: 0
Make:	Samsung
Model:	SGH-I717
URL:	http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=16088
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Comment 1 to 9 of 9

Page: 1

joe_347V

[Aug 12, 2013 at 11:02 PM]

I wonder if it broke from thermal shock since the bulb on the cram lamps get hotter.

A_lights

[Aug 12, 2013 at 11:05 PM]

yeah probably, i have encountered some 400W Ushio's separate at the base Shocked

and a GE has done it too

streetlight98

[Aug 13, 2013 at 01:28 AM]

Yeah PSMH lamps run at hotter temperatures and pressures so they're more apt to blowing up.

rjluna2

[Aug 13, 2013 at 11:18 AM]

Yikes

don

[Aug 15, 2013 at 02:45 AM]

I've seen a couple lamps blow up...or, I should say, the aftermath, lol. One was a 175w mercury vapor (Chinese Westinghouse) and the other was a Sylvania 400w Metalarc. The MV was in a cheap bucket light and that was a mystery but the MH was operating horizontal in a OV-25 for about 5 years... but the outer did stay intact. I was actually surprised it lasted that long!

vaporeyes

[Aug 15, 2013 at 02:47 AM]

I'll guess the broken side was up? Maybe that was a hot spot on the glass. Anyway, MH lamp explosions are interesting, but I prefer to see protected lamps used even with enclosed fixtures, because an exploded lamp is not fun to clean up and sometimes the arc tube contents splatter on the inside of the lens.

A_lights

[Aug 16, 2013 at 01:49 PM]

yeah it was base up in a cheap stonco all plastic wallpack

joe_347V

[Aug 17, 2013 at 04:48 AM]

I'm guessing it's sorta like those plastic HPS tallpacks then.

A_lights

[Aug 18, 2013 at 10:11 PM]

yeah but wider, i have to get a picture of them

Comment 1 to 9 of 9

Page: 1

Gallery of Lights

Odd Sylvania 175W cram failure

expected to see a broken lens or something but it appears the pressure built up in the lamp outer bulb and blew the side open! never seen this before..but out of the hundred or so i have removed none have blown up, just stopped working, more pulse start lamps blow up or get bulged arc-tubes at EOL!