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Thorn Gamma 6 18w SOX: Three years on.

Thorn Gamma 6 18w SOX: Three years on.

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The 18w Osram SOX lamp has now completed 3 years of dusk-dawn service on my patio.
All of the blackening aound the electrodes which was on the lamp from new has completey dissapeard and has now started to turn brown. I checked on this lamp several months ago and it had started turning white first.
There is also the very slightest hint of some orange staining around the bend at the bottom of the lamp.
There is no evidence of any sodium loss into the outer jacket at all.

The lamp is operated on a Parmar resonant start style ballast with no in-circuit ignitor.
Interesting to see the shadows of the electrodes from the bright sunlight.

1yr.jpg 2yr.jpg 3yr.jpg DPP00003351.jpg

Light Information

Light Information

Manufacturer:Osram
Lamp
Lamp Type:SOX

File information

File information

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Filename:3yr.jpg
Album name:FrontSideBus / HID: Sodium vapour - Low pressure
Keywords:Lamps
File Size:1876 KB
Date added:Feb 26, 2019
Dimensions:1280 x 1920 pixels
Displayed:92 times
Date Time:2019:01:30 13:47:42
DateTime Original:2019:01:30 13:47:42
Exposure Bias:0 EV
Exposure Time:1/200 sec
FNumber:f 8
Flash:No Flash
Focal length:47 mm
ISO:100
Make:Canon
Model:Canon EOS 70D
Software:Digital Photo Professional
White Balance:0
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