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What Is It ????? I bought this from eBay as a lot with a 1000w HPS lamp . It has absolutely no markings on it except for "P156" On what looks to be some sort of clear label on the side of the envelope and P128C hand written on the stem press . What appears to be the filament is a flat piece of thin metal about 1/8" wide and about 1 1/4" long. I bought the pair as they were extremely cheap . Is it possible that this is some sort of fuse ???? Any Ideas ???? Keywords: Miscellaneous

What Is It ?????

I bought this from eBay as a lot with a 1000w HPS lamp . It has absolutely no markings on it except for "P156" On what looks to be some sort of clear label on the side of the envelope and P128C hand written on the stem press . What appears to be the filament is a flat piece of thin metal about 1/8" wide and about 1 1/4" long. I bought the pair as they were extremely cheap .

Is it possible that this is some sort of fuse ???? Any Ideas ????

20231230_123547.jpg Sulfur.jpg DSCN9921.JPG tx_rx.jpg _IMG9151.JPG
Lamp/Fixture Information
Manufacturer:?
Model Reference: P156
Lamp
Lamp Type:?
Filament/Radiator Type:?
Base: E-40 ??
Shape/Finish:Tubular
Service Life:?
Burning Position:?
Fixture
Fixture Type:?
Ballast Type:?
Socket Type:E-40 ??
Location: My Collection
Electrical
Wattage:?
Voltage:?
Current:?
Optical
Lumen Output:?
Lumen Efficacy:?
Colour Temperature:?
Colour Rendering Index:?
Physical/Production
Dimensions: 9.25"L X 2.625" W
Factory Location:?
Assembly Line:?
Fabrication Date:?
Application/Use:????
File information
Filename:DSCN9921.JPG
Album name:wide-lite 1000 / Miscellaneous
Keywords:Miscellaneous
Filesize:1281 KiB
Date added:Jul 28, 2025
Dimensions:2272 x 1704 pixels
Displayed:27 times
DateTime Original:0000:00:00 00:00:00
Exposure Time:1/25 sec
FNumber:f/3.7
File Source:Digital Still Camera
Flash:No Flash
Flash Setting
Focal length:4.5 mm
ISO:400
Model:COOLPIX A300
Noise Reduction:OFF
Software:COOLPIX A300V1.1
White Balance:0
URL:https://trad-lighting.net/gallery/displayimage.php?pid=934
Favorites:Add to Favorites

Comment 1 to 7 of 7
Page: 1

Max   [Jul 28, 2025 at 06:11 AM]
What you have here is a tungsten ribbon lamp. It's a reference light source use for the calibration of light-measuring instruments.
Maxim   [Jul 28, 2025 at 02:31 PM]
I have something similar in my collection. Thank you, Max, for identifying what this is. Smile
Ria   [Jul 28, 2025 at 03:05 PM]
Fascinating, wonder if it's possible to light it..? What voltage would it be Wonder
Max   [Jul 28, 2025 at 05:36 PM]
It's possible to light it, you just need a good current source. This kind of lamp is normally rated for 16-17 A. The exact electrical specs are usually determined for each lamp and given in its calibration certificate, with a reference number, which is likely the one printed on the bulb (P156).
Tuopeek   [Jul 28, 2025 at 09:01 PM]
Max, would that be the type of lamp used in an optical Pyrometer then?
Max   [Jul 28, 2025 at 09:06 PM]
A (much) smaller version with a thinner filament is indeed the type used in optical pyrometers.
wide-lite 1000   [Jul 28, 2025 at 10:53 PM]
Thank you ! Now that I have a name , I was able to pull up pictures of several other versions of this .

Comment 1 to 7 of 7
Page: 1