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GE F8T5

GE F8T5

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Here is a GE F8T5 high colour rendition fluorescent lamp.

DSC05167_Sylvania_Canada_F20T12_GRO_LUX.JPG DSC05190_GE_F20T12_Gro_and_Sho.JPG DSC05176_GE_F8T5_High_Color_Rendering.JPG DSC04993_Globe_Mini_13W_Circline.JPG

Light Information

Light Information

Manufacturer:GE
Model Reference:F8T5/830/L
Lamp
Lamp Type:Fluorescent
Base:Miniature Bi-pin (G5)
Shape/Finish:T5
Service Life:7500 hours
Electrical
Wattage:8W
Optical
Lumen Output:410
Color Temperature:3000K
Color Rendering Index:80
Physical/Production
Factory Location:China

File information

File information

Download: Download this File
Filename:DSC05176_GE_F8T5_High_Color_Rendering.JPG
Album name:lite_lover / Fluorescent Lamps
Keywords:Lamps
File Size:97 KB
Date added:Mar 31, 2012
Dimensions:1024 x 768 pixels
Displayed:303 times
Date Time:2012:03:04 19:46:20
DateTime Original:2012:03:04 19:46:20
Exposure Bias:0 EV
Exposure Time:1/8 sec
FNumber:f 2.8
Flash:No Flash
Focal length:7.9 mm
ISO:2996699456
Make:SONY
Model:DSC-W1
Software:Paint.NET v3.36
White Balance:1549533184
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-64164
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TL8W
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May 19, 2012 at 10:55 AM Author: TL8W
Here'sanother one

We do not have to agree on anything to be kind to one another. The ability to be civil is available to everyone on earth, for free.

Powell
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May 19, 2012 at 11:41 AM Author: Powell
GE has (finally!) derated these to 5000 hours.

NNNN!

jercar954
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May 19, 2012 at 01:03 PM Author: jercar954
That long? Lol!

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

Powell
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May 19, 2012 at 01:27 PM Author: Powell
Maybe @ 24/7 if you are lucky....................

NNNN!

Ash
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May 19, 2012 at 01:45 PM Author: Ash
Average China F8T5 manage 1-1.5 years in Switch Start 24/365.25 thats about 10K hours actually
Powell
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May 19, 2012 at 01:49 PM Author: Powell
The Indonesian made GE F15T8 lamps can't (most of the time) do 5000 hours at 24/7. The Chinese GE lamps here ah maybe close to 7500. A test is running now. Lamp has thick end banding on both ends with growing black tear drop spots on both ends.....

NNNN!

Danny
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May 19, 2012 at 03:15 PM Author: Danny
Thats an interesting one! wish we had these here!
Powell
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May 19, 2012 at 04:16 PM Author: Powell
I'd love an 830....even better a 930....wait a 965!!!!

NNNN!

TL8W
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May 20, 2012 at 09:18 AM Author: TL8W
In the UK GE sells two types of T5 *W lamp: Standard with 5000 rated hours, and Specfill with 8000. The standard has an 18 ohm cathode cold resistance and Specfill has a 13 ohm which caters for the electrically aggressive environments of some emergency luminaires as well as providing longer tube life on standard gear.

We do not have to agree on anything to be kind to one another. The ability to be civil is available to everyone on earth, for free.

Ash
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May 20, 2012 at 10:35 AM Author: Ash
Emergency fixtures are Instant Start and underpowered, that would kill lamps in no time even the 8K hour ones

For Swwitch Start, does the resistance actually matter ? I thought its only the amount of emitter that matters
dor123
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May 20, 2012 at 11:27 AM Author: dor123
The cold cathodes operation of fluorescent lamps in emergency fixture that have an instant start inverter are ONLY because of their underpowering and nothing else.
If the inverter would supply full current to the lamps, but will remain instant start, then the electrodes will already be heated by the discharge itself (Like in HID lamps, LPS, fluorescents on cheap instant start electronic ballasts and CFLs) to the temperature of the thermionic emission, rendering the operation of the lamps as hot cathodes.
When a fluorescent lamps are underdriven, the inverter must heat the electrodes by itself, to keep the thermionic emission active. otherwise the lamps will be operated with cold cathodes and will have short life.
Most members don't know I think, but electrodes at and/or above the thermionic emission temperature = hot cathodes, and electrodes under the temperature of the thermionic emission temperature = cold cathodes. In a "Preheat/switchstart" ballast, the electrodes are heated by the starter ONLY before starting. After starting, the electrodes are heated only by the discharge.
The only ballasts that heats the electrodes during the lamp operation are: Dimmable electronic ballasts (When the lamp is dimmed), and rapidstart ballasts.

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.

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