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GTE-Sylvania Unalux ULX880, 880W High Pressure Sodium Retrofit Lamp, 1990 Made to only operate on 480V reactor ballasts. Keywords: Lamps

GTE-Sylvania Unalux ULX880, 880W High Pressure Sodium Retrofit Lamp, 1990

Made to only operate on 480V reactor ballasts.

IMG_0831.JPG BL_g_by.jpg SU-ULX880-111-1_0.jpg GE_50W_CMH_lit_and_cooldown.jpg WD1.jpg
Lamp/Fixture Information
Manufacturer:GTE-Sylvania
Model Reference:ULX880
Lamp
Lamp Type:High Pressure Sodium
Filament/Radiator Type:PCA (Poly Crystal Alumina)
Base:E39 (Mogul)
Shape/Finish:ET25
Service Life:12,000 Hrs ~
Burning Position:Universal
Fixture
Ballast Type:H36-15/RX (480V)
Electrical
Wattage:880W ~
Voltage:260V ~
Current:4.00A ~
Optical
Lumen Output:101,000 (Initial) / 91,000 (Average)
Lumen Efficacy:115/103 LPW
Colour Temperature:2100K CCT ~
Colour Rendering Index:25%
Physical/Production
Factory Location:Manchester, NH USA
Fabrication Date:3/90
Application/Use:Mercury Vapor Retrofit
File information
Filename:SU-ULX880-111-1_0.jpg
Album name:Eric / High Pressure Sodium Lamps
Keywords:Lamps
Filesize:349 KiB
Date added:29 Apr 2026
Dimensions:2048 x 910 pixels
Displayed:714 times
URL:https://trad-lighting.net/gallery/displayimage.php?pid=1232
Favourites:Add to Favourites

Comment 1 to 12 of 12
Page: 1

Drew   [Wed 29 Apr 2026 at 14:07]
I have never seen one of this wattage before, probably because 1000W reactor and HX ballasts seem to practically non-existent (or at least I haven't heard much about them in the US). Seeing this warm up would be really cool, even if just for a test on CWA, but at the same time it looks so nice in it's current pristine condition. Very nice lamp!
Sammi   [Wed 29 Apr 2026 at 17:44]
It would be pretty warm actually... Mr. Green
Max   [Wed 29 Apr 2026 at 23:00]
That's quite a unique lamp there. If I'm not mistaken, GTE Sylvania was the only lamp maker to offer this type. I'm with Drew, you should light it up (and post pictures here).
Eric   [Wed 29 Apr 2026 at 23:36]
@Drew - This lamp will never be tried on a CWA...to rare to risk.
@Max - A GTE-Sylvania exclusive...I've never seen any mention of a competing option from GE, or Westinghouse/Philips.
Drew   [Thu 30 Apr 2026 at 00:02]
@Eric
Good call, I believe it only begins to become harmful as they start to age, but yeah as you said it is not worth the risk
Eric   [Thu 30 Apr 2026 at 01:03]
@Drew - I also have a first generation version from 1980...there are some differences in the design...maybe I should post that one too.
Ria   [Thu 30 Apr 2026 at 02:01]
@Sammi - Hey, that's my line Razz Mr. Green
Eric   [Thu 30 Apr 2026 at 03:08]
@Ria - What about Slap ?
Ria   [Thu 30 Apr 2026 at 14:23]
Ok, if you insist, come here Slap Slap Razz
wide-lite 1000   [Mon 04 May 2026 at 03:21]
I have one of these . I agree with not testing on a CWA . I tried it with mine , it ran up fine and worked for about 20 min. than started cycling . It wont even run all of the way up anymore !
347vPowerlite   [Wed 27 May 2026 at 04:26]
Neat lamp, it's too bad these weren't compatible with CWA ballasts as it's hard to find a 1kW MV ballast that isn't a CWA. The only ones I could think of are the 480v reactors.
Eric   [Sun 31 May 2026 at 18:49]
@347V - Yeah, I wish that too...it'd be fun to run them up at least once.

Comment 1 to 12 of 12
Page: 1