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1000W SON/T Just got this Belgium made Philips 1kW SON/T through the post. I bought it as I know it came from a large collection being sold of via eBay. Its packaging has ‘MCR Test-lab’ written on it so got me inquisitive! It also has the date 7/6/00 written on it but the lamp has A7 for the date code, so looks like a Jan 1987 manufactured lamp. It is also the only Philips high pressure sodium lamp, I have, that actually has the twisted support wire as shown in their early catalogues. I believe this was done to reduce shadows when used in luminaries with reflectors. Compared to another 1kW SON/T I have the arc tube is slightly longer. Quite a monster lamps and although it appears to have had some run time it’s not all that much. Keywords: Lamps

1000W SON/T

Just got this Belgium made Philips 1kW SON/T through the post. I bought it as I know it came from a large collection being sold of via eBay. Its packaging has ‘MCR Test-lab’ written on it so got me inquisitive! It also has the date 7/6/00 written on it but the lamp has A7 for the date code, so looks like a Jan 1987 manufactured lamp. It is also the only Philips high pressure sodium lamp, I have, that actually has the twisted support wire as shown in their early catalogues. I believe this was done to reduce shadows when used in luminaries with reflectors. Compared to another 1kW SON/T I have the arc tube is slightly longer. Quite a monster lamps and although it appears to have had some run time it’s not all that much.

4kW_repro2.jpg Mazda_60W_2-pin_Fireglow_Lamp.jpg PH_SON_1k.jpg Osram_NAV-T_150W_-_FRG_1981_a.jpg Osram_HQI-TS_150W21NDL_Excellence.jpg
Lamp/Fixture Information
Manufacturer:Philips
Model Reference:SON/T
Lamp
Lamp Type:HP sodium
Shape/Finish:tubular
Electrical
Wattage:1000w
Physical/Production
Factory Location:Belgium
Fabrication Date:Jan 1987
File information
Filename:PH_SON_1k.jpg
Album name:Tuopeek / High Pressure Sodium
Keywords:Lamps
Filesize:183 KiB
Date added:Oct 24, 2024
Dimensions:2400 x 1547 pixels
Displayed:13 times
DateTime Original:2024:10:24 11:12:22
Exposure Time:1/125 sec
FNumber:f/4.2
File Source:Digital Still Camera
Flash:No Flash
Focal length:29 mm
ISO:280
Model:NIKON D3400
Software:Adobe Photoshop Elements 2.0
White Balance:0
URL:https://trad-lighting.net/gallery/displayimage.php?pid=568
Favorites:Add to Favorites

Comment 1 to 5 of 5
Page: 1

Sammi   [Oct 24, 2024 at 02:25 PM]
The date writted on the lamp might be the date it went into service, we write the date that we first light lamps. Wonder
Tuopeek   [Oct 24, 2024 at 06:51 PM]
That's possible. I was thinking it might have been when the previous collector got it as it is hand written on the carton along with the lab info. I also sometime put dates on lamps when they go into service to see how well they do. Smile
Max   [Oct 27, 2024 at 12:38 PM]
Nice big SON/T! Its overall design (frame, 5-pcs burner, and barium flash getter) indicates that this is clearly a 1980s lamp (made at the Turnhout, Belgium, factory), so A7 does translates to January 1987 indeed. The lamp construction saw several key upgrades during the 1990s, such as a ZrFeCo getter pellet replacing the barium mirror, and a simpler 3-pcs burner replacing the old 5-pcs design. The lamp reference also changed to SON-T 1000W during that period.
Sammi   [Oct 27, 2024 at 02:56 PM]
It's wonderful that you can share such in depth knowledge.! Love High Pressure Sodium (Tubular)
Tuopeek   [Oct 27, 2024 at 05:33 PM]
Indeed, thanks for confirming the date and type. It would be nice to find out what the 'MCR Test-lab' refers too. I think the collector had a few items with this reference.

Comment 1 to 5 of 5
Page: 1