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Tungsram Incandescent lasted 2.5 years

Tungsram Incandescent lasted 2.5 years

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I always mark the date of first use on the base of lamps and so I installed this Tungsram lamp on the 15th of January 2017 in a ceiling fixture together with two more (3 in total) of these lamps in the same fixture. Last week the first one failed which you see here. That means it lastet 2.5 years and it was well used! The other two are still going strong, their filaments look pretty good.

To me this once again confirms that older lamps, even though of course all rated at the usual 1000 hours, seem to last longer due to better build quality that prevents early failures and gives the lamp a good chance of meeting and exceeding it's rated life. With some modern lamps I have seen you are lucky if it got beyond 600-700 hours.

I should have bought more of these back then, now I have only one left.

Tungsram.jpg Orange Spiral Filament LED.jpg SDW-T_Gear.jpg NOS_SOX_18W.jpg

Light Information

Light Information

Manufacturer:Tungsram
Lamp
Lamp Type:Incandescent
Base:E14
Electrical
Wattage:25
Voltage:230
Optical
Lumen Output:~ 220 Lm

File information

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Filename:Tungsram.jpg
Album name:Skiller / Lamps, gear and accessory
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Date added:Jul 22, 2019
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Date Time:2019:07:22 21:04:25
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rjluna2
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Robert


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Jul 22, 2019 at 02:18 PM Author: rjluna2
How is this based on? Burning continuously or turned on/off between 3 to 6 hours per day?

Pretty, please no more Chinese failure.

Skiller
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Jul 22, 2019 at 03:35 PM Author: Skiller
2-3 hours on average per day. That would be a total of 2280 hours at 2.5 hours a day.
I didn't mention it because the default for the common 1000h = 1 year figure is 2.7 hours a day, so just plain standard usage here.

I wouldn't use incandescent lamps in a place where they burn 24 hours a day, that would be a waste of lamps and power.
dor123
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Jul 23, 2019 at 03:22 AM Author: dor123
What is the use of this lamp, that it survived for long time? Lamps for appliance like refrigerators, tends to last longer, as they burning colder than standard GLS lamps.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

rjluna2
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Jul 23, 2019 at 05:33 AM Author: rjluna2
Danke, Skiller

Pretty, please no more Chinese failure.

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Jul 23, 2019 at 06:42 AM Author: Skiller
@ rjluna2 You're welcome.

@ dor It's a standard GLS household lamp installed in an open ceiling fixture in a short apartment hallway (also it would be too big to fit in most refrigerators, those usually use "Pygmy" 15W lamps). Line voltage is a pretty constant 233-236 Volts here, so it's not running cooler.

I can't decipher Tungsram date codes but judging by the packaging design and the fact it says 230 Volts (rather than 220) I assume it was manufactured in the 90's or very early 2000's. I bought a couple of these NOS in January 2017 and I'm eager to see how long the others will last. I will report back!
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