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Brightness variations, take 2 Earlier this month I got a Sylvania F18T8/CW/K26 from 2000 which is virtually NOS. The post-2003 GE F26"T8/CW/4 was found last week, in a cooking range as always. It is moderately used, but look at how dim it is! Not quite common to see one of these dim as much. And this can only be phosphor degradation as this model has never been Ecolux, and probably never will be. Keywords: Lit_Lighting

Brightness variations, take 2

Earlier this month I got a Sylvania F18T8/CW/K26 from 2000 which is virtually NOS. The post-2003 GE F26"T8/CW/4 was found last week, in a cooking range as always. It is moderately used, but look at how dim it is! Not quite common to see one of these dim as much. And this can only be phosphor degradation as this model has never been Ecolux, and probably never will be.

102_1374.JPG 102_1332.JPG 102_1331.JPG 102_1314.JPG HPIM1369.JPG
File information
Filename:102_1331.JPG
Album name:Vince / Collection of fluorescent lamps (CFLs and linear)
Keywords:Lit_Lighting
Filesize:124 KiB
Date added:May 28, 2014
Dimensions:2000 x 1500 pixels
Displayed:253 times
Color Space:sRGB
Contrast:0
DateTime Original:2014:05:27 20:12:11
Exposure Bias:-1 EV
Exposure Mode:0
Exposure Program:Program
Exposure Time:1/640 sec
FNumber:f/2.8
Flash:No Flash
Focal length:5.85 mm
ISO:71
Light Source:Unknown: 0
Make:Eastman Kodak Company
Max Aperture:f/2.8
Model:KODAK Z812 IS ZOOM DIGITAL CAMERA
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=17574
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Comment 1 to 6 of 6
Page: 1

streetlight98   [May 28, 2014 at 12:38 AM]
I have a ValueBright F20/CW that's really dim. Probably weak phosphors too i guess... I call it my ValueDim lamp lol.
GEsoftwhite100watts   [May 29, 2014 at 05:01 AM]
Some of those generic overseas F15T8/CWs can be pretty dim and have an icky greenish-yellowish light output too...I have some like that.
A_lights   [May 30, 2014 at 11:10 PM]
The GE Indonesian F15T8/CW are bright at first but have terrible lumen maintaince and then end band and seem to go mercury starved just before EOL
GEsoftwhite100watts   [May 31, 2014 at 04:15 AM]
The F24T8 18w appliance lamps on my boat (in American-Fluorescent instant start wrarparounds) seem to be a LOT dimmer now...I was thinking "lumen depreciation" just today in fact!
TiCoune66   [Jun 08, 2014 at 01:41 AM]
I got an OEL Indonesian GE F15T8/WW which was still pretty bright, sent it back to recycling today. I did notice that the /CWs were more greenish compared to North-American made cool whites.
GEsoftwhite100watts   [Jun 08, 2014 at 09:55 PM]
Yeah I've noticed that too on generic overseas F15T8/CWS.

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