| Lamp/Fixture Information |
| Manufacturer: | Me |
| Lamp |
| Lamp Type: | Dry air (top and bottom) and water vapor (middle) negative glow |
| Filament/Radiator Type: | Nonthermal discharge in low-pressure nitrogen and oxygen (top and bottom) or in low-pressure water vapor (middle, capacitively coupled) |
| Physical/Production |
| Factory Location: | Home |
| Fabrication Date: | 19 March 2026 |
| Application/Use: | Testing and experimentation |
| File information |
| Filename: | DSCF0245m.jpg |
| Album name: | Max / Misc lamps and lighting |
| Keywords: | Lamps |
| Filesize: | 564 KiB |
| Date added: | 19 Mar 2026 |
| Dimensions: | 1500 x 1000 pixels |
| Displayed: | 111 times |
| DateTime Original: | 2026:03:19 19:17:27 |
| Exposure Time: | 2 sec |
| FNumber: | f/11 |
| File Source: | Digital Still Camera |
| Flash: | No Flash |
| Focal length: | 55 mm |
| ISO: | 160 |
| Model: | X-E4 |
| Software: | Adobe Photoshop 25.7 (Windows) |
| White Balance: | 0 |
| URL: | https://trad-lighting.net/gallery/displayimage.php?pid=1141 |
| Favourites: | Add to Favourites |
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Search![Negative glow lamps: new and old design after some use
The improved negative glow lamp (center - see [url=https://trad-lighting.net/gallery/displayimage.php?pid=1144]there[/url]) works very well as long as the release of sodium from the electrode sleeves is kept to a minimum. Its operation is very stable even with a highly reactive plasma in low-pressure water vapor, and there is no sign of bulb blackening at all, a problem which plagues glow lamps made with standard unsheathed electrodes (top and bottom). However, the disadvantage of the new lamp is that it requires an operation at high frequency (kHz and up) in order to properly excite the glow discharge.
Keywords: Lamps](albums/userpics/10005/10/normal_DSCF0245m.jpg "Click to view full size image
==============
Negative glow lamps: new and old design after some use
The improved negative glow lamp (center - see [url=https://trad-lighting.net/gallery/displayimage.php?pid=1144]there[/url]) works very well as long as the release of sodium from the electrode sleeves is kept to a minimum. Its operation is very stable even with a highly reactive plasma in low-pressure water vapor, and there is no sign of bulb blackening at all, a problem which plagues glow lamps made with standard unsheathed electrodes (top and bottom). However, the disadvantage of the new lamp is that it requires an operation at high frequency (kHz and up) in order to properly excite the glow discharge.
Keywords: Lamps")
