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Sylvania 100w Warmtone /N from 1979

Sylvania 100w Warmtone /N from 1979

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Interesting this is fully coated. Looks to have a very thick /C phosphor.

image~389.jpeg image~388.jpeg image~365.jpeg image~359.jpeg

Light Information

Light Information

Manufacturer:Sylvania
Model Reference:H38JA-100/N
Lamp
Lamp Type:Mercury Vapor
Filament/Radiator Type:quartz arc tube
Base:Mogul
Shape/Finish:BT25 coated
Service Life:24,000 hours
Electrical
Wattage:100w
Voltage:130v
Current:1.5A
Optical
Lumen Output:3500 lumens
Lumen Efficacy:35 lpw
Color Temperature:3300K
Color Rendering Index:50
Physical/Production
Dimensions:About 8 inches
Factory Location:Manchester, NH
Fabrication Date:1979

File information

File information

Download: Download this File
Filename:image~365.jpeg
Album name:silverliner / good ol' mercury vapor
Keywords:Lamps
File Size:663 KB
Date added:Aug 24, 2017
Dimensions:2464 x 1848 pixels
Displayed:115 times
Date Time:2017:08:20 14:27:54
DateTime Original:2017:08:20 14:27:54
Exposure Bias:0 EV
Exposure Time:1/15 sec
FNumber:f 2.2
Flash:No Flash
Focal length:4.15 mm
ISO:25
Make:Apple
Model:iPhone 6s Plus
Software:9.0
White Balance:0
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Comments
LandryB
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Aug 24, 2017 at 08:29 PM Author: LandryB
I just got one like this off ebay. The phosphor on mine is very thick. I didn't know Sylvania made fully phosphored BT-25 bulbs. Mine has a date code of "100" just below the wattage on the top.




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Aug 24, 2017 at 08:32 PM Author:
Beautiful design, but this lamp looks obsolete nowadays. A 35W xenon lamp manages to light 3500 lumens at 100 lm/w. Bit with 4300K
icefoglights
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ITT Low Pressure Sodium NEMA


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Aug 24, 2017 at 09:19 PM Author: icefoglights
Very cool!

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LandryB
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Dec 18, 2017 at 11:51 AM Author: LandryB
How does this look compared to the fully-phosphored Westinghouse /C when lighted?
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