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another old ge 15w daylight

another old ge 15w daylight

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old ge 15w daylight.

ge15wwhite.jpg syl15wbk.jpg ge15wd.jpg syl15w_white.jpg

Light Information

Light Information

Manufacturer:ge
Model Reference:15w daylight
Lamp
Lamp Type:fluorescent
Base:bipin
Electrical
Wattage:15
Physical/Production
Dimensions:18"
Factory Location:usa
Fabrication Date:tba

File information

File information

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Filename:ge15wd.jpg
Album name:toomanybulbs / misc stuff
Keywords:Lamps
File Size:153 KB
Date added:May 13, 2011
Dimensions:2048 x 1150 pixels
Displayed:153 times
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jercar954
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May 13, 2011 at 04:16 PM Author: jercar954
This lamp, which is from the 4th quarter of 1951, is a halophosphate lamp, not beryllium zinc silicate. Beryllium was banned as of 6/49.

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

toomanybulbs
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May 14, 2011 at 06:33 AM Author: toomanybulbs
strange it has the same orangish persistance of the early ge i posted.
did early halophosphates have this?
jercar954
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May 14, 2011 at 07:42 AM Author: jercar954
Yes, in fact, one of the tell tale signs of a halophosphate lamp is a orange-yellowish "flash" when you shut the power off to it.

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

Silverliner
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Rare white reflector


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May 14, 2011 at 09:39 AM Author: Silverliner
Yup. One way to tell if a lamp has beryllium is the long afterglow after being turned off. Did your Sylvania do that?

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toomanybulbs
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May 15, 2011 at 12:56 AM Author: toomanybulbs
compared to the known antiques i have and they do not have this afterglow.so this and the sylvania t12 are likely early halophosphates.
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