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A Sylvania F32T8 banding

A Sylvania F32T8 banding

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This Sylvania F32T8/841 in our apartment building is end banding which is somewhat unusual. It had no end darkening a few days ago so it's likely going to die soon. It's in a two lamp wraparound light and the other lamp has been dead for about a year or more. These are original to the building 2009/2010

Screenshot_20190716-130028~2.png IMG_20190708_142401.jpg IMG_20190601_144016.jpg IMG_20190429_095424.jpg

Light Information

Light Information

Manufacturer:Sylvania
Model Reference:F32T8/841
Lamp
Lamp Type:Fluorescent
Service Life:9to10 years
Fixture
Fixture Type:Wraparound
Ballast Type:Electronic
Electrical
Wattage:64+BL
Voltage:120-240
Optical
Color Temperature:4100k

File information

File information

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Filename:IMG_20190601_144016.jpg
Album name:Dan The Bulb Man / Cool things
Keywords:Lamps
File Size:330 KB
Date added:Jun 01, 2019
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Date Time:2019:06:01 14:40:16
DateTime Original:2019:06:01 14:40:16
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streetlight98
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Mike McCann


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Jun 01, 2019 at 04:51 PM Author: streetlight98
From what I've seen, Sylvania lamps used for long periods of time each day don't usually develop much blackening until a couple days to a week before EOL. When they're frequently switched they blacken faster though (same for any instant start lamp I'd imagine).

Please check out my newly-updated website! McCann Lighting Company is where my street light collection is displayed in detail.

LampLover
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120/240VAC @ 60HZ


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Jun 01, 2019 at 06:11 PM Author: LampLover
I have two GE F32T8 lamps from around 2016 and it is in my kitchen fixture used for about 1-2 hours at a time but with frequent switching cycles (I did however buy a program start ballast for the fixture) they are now starting to show very light black marks on the ends where the filaments or cathodes are. I think GE lamps from around that time were the best of all of the big lamp makers. I don't know how the lamps are today though.

Also clean that fixture

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Dan The Bulb Man
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Jun 01, 2019 at 06:24 PM Author: Dan The Bulb Man
These are on 24/7 365 for 9 to 10 years
streetlight98
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Jun 01, 2019 at 06:29 PM Author: streetlight98
For electronic T8s, I think hands down GE was the best manufacturer of lamps from the mid-2000s until the mid-2010s. Starting around 2016 I noticed more and more issues associated with low mercury dosage. I've noticed some EcoLux F40T12s have issues starting on some rapid start ballasts. GE T8s tend to blacken rather early on but work long after the ends are blackened. Programmed start definitely helps the lamps without a doubt. Only time instant start is better than programmed start is when a large group of lights are turned on in the morning and stay on all day, as the ballasts use less power than programmed start ballasts, and the negative effects of cold starting the lamp are pretty insignificant given the run time per start-up. I think instant start might start at a lower minimum temperature than programmed start but that's not necessarily good for the lamp.

Running 24/7 since 2009 is a bit of a stretch. That's 87000 hours. While the lamps do last a long time, especially when run 24/7, that's over 3.5X the rated life.

Please check out my newly-updated website! McCann Lighting Company is where my street light collection is displayed in detail.

Dan The Bulb Man
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Jun 02, 2019 at 04:27 PM Author: Dan The Bulb Man
LampLover: This is not my light fixture it is in my apartment building but not in my actual apartment. Besides I don't have nor need a big ladder to clean it.
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Jun 13, 2019 at 11:25 AM Author: Dan The Bulb Man
This lamp is still living the banding has gotten a little darker but not by much.
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Jun 13, 2019 at 03:18 PM Author: jercar954
From my experience, Sylvania preheat linears last far longer if used 24/7 than switched on frequently. In my parent's old home, they had a preheat F15T12 fixture over the kitchen sink that was used in short on/off cycles. I never had a Sylvania last any longer than a year and a half while GEs would go about 5-6 years.

Preheat and T-12 fluorescents forever! Down with LED's and instant start T-8 fluorescents.

streetlight98
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Mike McCann


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Jun 13, 2019 at 03:42 PM Author: streetlight98
Pretty much all lamps will last longer when ran 24/7. MH and possibly LED are two exceptions I can think of.

Please check out my newly-updated website! McCann Lighting Company is where my street light collection is displayed in detail.

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Jun 16, 2019 at 01:32 PM Author: Dan The Bulb Man
This lamp died today and I saw its last few seconds of life bright orange and purple flashes dim stations then pssssss vacuum loss.

Then darkness...
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