florescent bulbs - WOW! - Gallery of Lights

File information
Filename:	PICT0026.JPG
Album name:	GEsoftwhite100watts / florescent bulbs
Keywords:	Lit_Lighting
Company and Date Manufactured:	GE, May 1979
Model Number:	F40WW
Wattage:	40w
Lamp Type:	Florescent
Filesize:	72 KiB
Date added:	May 21, 2013
Dimensions:	640 x 480 pixels
Displayed:	140 times
Color Space:	sRGB
Contrast:	0
DateTime Original:	2013:05:20 17:28:42
Exposure Bias:	0 EV
Exposure Mode:	0
Exposure Program:	Program
Exposure Time:	1/640 sec
FNumber:	f/2.8
Flash:	No Flash
Focal length:	5.8 mm
ISO:	50
Light Source:	Unknown: 0
Make:	Minolta Co., Ltd.
Max Aperture:	f/2.8
Model:	DiMAGE Z1
URL:	http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=15773
Favorites:	Add to Favorites

Comment 1 to 5 of 5

Page: 1

RCM

[May 21, 2013 at 07:03 PM]

Looks like it might be running in cold cathode mode there...seen it on near EOL lamps.

A_lights

[May 21, 2013 at 07:20 PM]

very cool! i only see this happen on older vintage lamps near EOL,newer lamps dont seem to do it

GEsoftwhite100watts

[May 22, 2013 at 02:33 AM]

On cold-cathode now or at some previous time? Like improperly installed/previous abuse?

A_lights

[May 22, 2013 at 04:04 AM]

yeah i guess...

GEsoftwhite100watts

[May 22, 2013 at 02:57 PM]

Sounds like maybe it got the improperly-installed-in-a-LPF-shoplight treatment so then they thought it was dead?
I'm considering sticking this one in use to see how long it goes before EOL...

Update...I had it on HPF rapid start for a few hours...after which it started permanently rectifying. Then it didn't last but maybe 10 seconds on electronic instant-start, with a cool, slow vacuum loss! Laughing

Comment 1 to 5 of 5

Page: 1

Gallery of Lights

WOW!

Near-EOL warm white Mainlighter found in the trash...you can see the mercury discharge!