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GE F48T12/D/HO Nearing EOL

GE F48T12/D/HO Nearing EOL

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This is one of several well used lamps I received from Aaron that came out of a Walgreens sign, if I recall. It's been in usage in the garage for around 2 1/2 years...not bad for an already old lamp.

005_1~26.JPG F96T12.jpg 003_1~27.JPG 005_1~25.JPG

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Album name:don93s / Various Lights
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Date added:Jan 01, 2018
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Date Time:2018:01:01 12:29:55
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streetlight98
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Jan 01, 2018 at 10:38 AM Author: streetlight98
I got some of the same lamps from Aaron a couple years ago. I have one pair in use in a Sears F40 shoplight I retrofitted to F48/HO. Still going strong despite the heavy end blackening. Really good lamps! No idea how old they are though. IIRC, he sent me four of these, four newer used CW versions, and two NOS GE CW F48 slimlines along with some miscellaneous plunger sockets. I have a pair of brand new Sylvania F48HO/CW lamps that blow these away in brightness but I was told Sylvania lamps dim really fast and dim a lot. My GE HOs are no brighter than normal F40s lol.

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Jan 01, 2018 at 11:29 AM Author: don93s
Yeah, these GE /D lamps are about as bright as new 40w /CW lamps due to the age, though Daylight are not bright to begin with. As for the Sylvania, yeah, I've been having problems with them for years. We use a ton of /HO and slimline lamps at work and most of them are Sylvania since we have a work account at Lowes. The lamps start out great but within a year or two, they go mercury starved and dim out. Most don't even reach EOL.
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Jan 01, 2018 at 11:46 AM Author: streetlight98
Oh their slimlines are no good either? I have a pair of F48T12/CW Ecologic slimlines from Sylvania that came with my F48 SL strip light. I don't use the strip light regularly though because I can't seem to find the 4ft slimline lamps locally for less than like $10 a pop.

Lowe's always confused me as to why they carry GE and Sylvania fluorescent lamps. You'd think they'd have a contract with only one company like Home Depot. Since the Eco tubes came out I've liked GE tubes best but now I feel like their quality may be starting to slip. They've been on the decline in quality for all their other lamps including incandescent and HID and their fixtures have been becoming junk too since the late 90s. Really sad to see one of the best brands in lighting become nothing.

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Jan 01, 2018 at 12:02 PM Author: don93s
The Sylvania F96T12/D50 look great when first installed but after a year or two, they dim right out and stiate/flicker with dim argon glow. I'm surprised they can get away with this after so many years of this crap. Seems there is a serious quality control/engineering issue that gets ignored.
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Jan 01, 2018 at 12:07 PM Author: F96T12 DD VHO
Why is it green in some areas

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Jan 01, 2018 at 03:40 PM Author: don93s
Might be the type emitters reacting with the phosphors. In person, you can see a blend of green, yellow, and brown around the cathodes, along with the blue glow from the discharge.
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Jan 02, 2018 at 09:41 AM Author: suzukir122
I sense an EOL show potentially happening. This is worth a YouTube video, honestly. Especially if that's running on an HO ballast.
And also, I don't see HO lamps during EOL phase like this very often.

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Jan 02, 2018 at 12:22 PM Author: don93s
The type F48/HO ballast will determine the EOL show. I have some that are rated 50F, 280ocv, and EOL just like a regular boring 40w RS lamp. Then there are the -20F rated ones with 460-480ocv which causes quick vacuum loss. The one here is right in between with 360ocv which can put on a good show before vacuum loss, which may take hours.
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