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Philips/Ecko 60W SO/H Lamp Here is a 60W SO/H lamp, this one is a combination of a Philips outer Dewar jacket and an Ekco arc tube. Not quite sure how these two came to be together, but I would imagine it was not unusual in the field for jackets and inners from different manufacturers to get mixed from time to time. I am not certain of the age of this lamp, the date codes are unfamiliar to me. I think if I am interpreting the Philips chart on Lamptech correctly, the outer jacket is from the 1st quarter of 1956, but no idea about the arc tube. Keywords: Lamps

Philips/Ecko 60W SO/H Lamp

Here is a 60W SO/H lamp, this one is a combination of a Philips outer Dewar jacket and an Ekco arc tube. Not quite sure how these two came to be together, but I would imagine it was not unusual in the field for jackets and inners from different manufacturers to get mixed from time to time. I am not certain of the age of this lamp, the date codes are unfamiliar to me. I think if I am interpreting the Philips chart on Lamptech correctly, the outer jacket is from the 1st quarter of 1956, but no idea about the arc tube.

GE_S4_Sunlamp.jpg Easydim20220-240V2060W20Self20Dimming20Lamp.jpg Ekco-Philips_60W_SO-H_Lamp.jpg Early_Philips_55W_SOX.jpg Duro_Test_120V_750W_Reflector_Lamp.jpg
Lamp/Fixture Information
Manufacturer:Philips (Dewar jacket) / Ekco (inner arc tube)
Model Reference:SO/H
Lamp
Lamp Type:Low Pressure Sodium
Filament/Radiator Type:U-shaped LPS arc tube
Base:Porcelain BY22d
Shape/Finish:Tubular, clear
Service Life:Not known at present
Burning Position:Vertical cap up to horizontal
Electrical
Wattage:60
Voltage:100
Current:0.6A
Physical/Production
Factory Location:Holland (jacket) / England (inner)
Fabrication Date:Not known at present
File information
Filename:Ekco-Philips_60W_SO-H_Lamp.jpg
Album name:Ria / Low Pressure Sodium Lamps
Keywords:Lamps
Filesize:186 KiB
Date added:09 Nov 2026
Dimensions:1897 x 1019 pixels
Displayed:10 times
URL:https://trad-lighting.net/gallery/displayimage.php?pid=1455
Favourites:Add to Favourites

Comment 1 to 5 of 5
Page: 1

Max   [Mon 09 Nov 2026 at 21:01]
Awesome combo! And it's nice to see it in operation too, that's such a classic. Can you find a date code on your EKCO lamp? It should be a letter followed by a number, or reversed. E.K. Cole sourced its lamps from a variety of manufacturers. Their SO lamps came either from Philips or AEI, and given the transverse electrode design in your lamp (difficult to see in you pictures) it seems that it came from the latter.
Ria   [Mon 09 Nov 2026 at 22:59]
I couldn't see a date code on the Ekco inner, this is an old picture that was on LG previously, I'm just reposting some of the better ones at the moment. Once I've done those, I'll start taking new pictures of some of the others. I'll find the lamp out at some stage and see if there's anything I missed, but it might take a while, so be patient..!
Max   [Mon 09 Nov 2026 at 23:02]
No problem, take your time Smile
AgentHalogen_87   [Tue 10 Nov 2026 at 16:07]
Another great oldie! Given Ekco used Philips made tubes at some point, is it possible that they supplied some of their tubes with Philips badged jackets for a time?
Ria   [Tue 10 Nov 2026 at 20:29]
That's very possible Wonder

Comment 1 to 5 of 5
Page: 1