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Westinghouse C70S62/PAR Dichroic 70W HPS Lamp Many thanks to Eric (BT25) for this amazing lamp, which is one of only five known in the world in collectors' hands..! Designed for use in US coal mines, it is probably one of the first discharge lamps with a dichroic reflector and also perhaps the first HPS lamp in a sealed beam reflector. It has a very wide flood beam pattern and due to the action of the reflector, very little heat is radiated from the front of the lamp, but is instead directed out of the rear. The lit images are at bottom left, just after ignition, and on the right after warm-up. From information received from another collector, I believe this particular lamp dates back to 1979, but we can't pinpoint it any closer than that, so if anyone has any more information, please get in touch. Keywords: Lamps

Westinghouse C70S62/PAR Dichroic 70W HPS Lamp


Many thanks to Eric (BT25) for this amazing lamp, which is one of only five known in the world in collectors' hands..! Designed for use in US coal mines, it is probably one of the first discharge lamps with a dichroic reflector and also perhaps the first HPS lamp in a sealed beam reflector. It has a very wide flood beam pattern and due to the action of the reflector, very little heat is radiated from the front of the lamp, but is instead directed out of the rear. The lit images are at bottom left, just after ignition, and on the right after warm-up.

From information received from another collector, I believe this particular lamp dates back to 1979, but we can't pinpoint it any closer than that, so if anyone has any more information, please get in touch.
20190910_183327.jpg 20180916_174121.jpg 20200108_115012.jpg Westinghouse20C70S62-PAR2020Dichroic20HPS~0.jpg Thorn_50W_Pearl_HPS.jpg
Lamp/Fixture Information
Manufacturer:Westinghouse Electric Corporation
Model Reference:C70S62/PAR
Lamp
Lamp Type:High Pressure Sodium
Filament/Radiator Type:PCA Arc Tube
Base:Medium Side Prong
Shape/Finish:PAR38 Dichroic
Service Life:7,500 hours
Burning Position:Universal
Fixture
Ballast Type:S62
Electrical
Wattage:70
Voltage:52
Current:1.6A
Optical
Lumen Output:4,500 lm at 100 hours
Lumen Efficacy:68.3 lm/W
Colour Temperature:2100K
Colour Rendering Index:22
Physical/Production
Dimensions:4.3125in / 110mm
Factory Location:Fairmont WV, USA
Fabrication Date:December 1979
Application/Use:Mine lighting
File information
Filename:Westinghouse20C70S62-PAR2020Dichroic20HPS~0.jpg
Album name:Ria / High Pressure Sodium Lamps
Keywords:Lamps
Filesize:397 KiB
Date added:03 Aug 2024
Dimensions:2008 x 1506 pixels
Displayed:52 times
URL:https://trad-lighting.net/gallery/displayimage.php?pid=162
Favourites:Add to Favourites

Comment 1 to 12 of 12
Page: 1

Sammi   [Sat 03 Aug 2024 at 22:46]
It certainly is wonderful, we must light it up again.! Cool
BT25   [Thu 15 Aug 2024 at 04:14]
Glad that you still like this one! Very Happy
Ria   [Thu 15 Aug 2024 at 13:44]
It's brilliant..! As Sammi said, it needs another lighting-up, but then so do all the hundreds of others... Rolling Eyes Razz
Tuopeek   [Sun 08 Feb 2026 at 10:28]
yes, this would have been perfect to flood light my parents pond back in the 1980s were my SON/R didn't survive the weather.
Ria   [Sun 08 Feb 2026 at 12:14]
Not many of these around, Eric says there are only 5 known to exist in collectors' hands; he has two, James has one, I have one but I don't recall who has the other, Eric will know.
Max   [Sun 08 Feb 2026 at 12:23]
I have one.
Ria   [Mon 09 Feb 2026 at 13:21]
Ah, you're No.5 then..!
BT25   [Mon 23 Mar 2026 at 23:59]
@Max - Did you ever take a pic of yours?
Max   [Tue 24 Mar 2026 at 20:58]
Not yet, Eric.
BT25   [Tue 24 Mar 2026 at 23:50]
Looking forward to when you do.
Max   [Thu 26 Mar 2026 at 19:21]
It's definitely a nice lamps. Someday I'll dig it out of the collection and I'll take some pictures. I also have a later Philips variant with an E26 end cap and a modern monolithic arc tube. Now I'm curious about the differences between the two lamps.
Ria   [Thu 09 Apr 2026 at 23:53]
So am I now that you mention it, I'd heard of the Philips version but I've never seen one.

Comment 1 to 12 of 12
Page: 1