Return to the thumbnail page Display/hide file information See previous file See next file

Sylvania Unalux 150 Watt High Pressure Sodium Retrofit Lamp

Sylvania Unalux 150 Watt High Pressure Sodium Retrofit Lamp

Click to view full size image

This lamp was made to be a replacement for mercury vapor lamps on HX ballasts. I had been on the lookout for one of these for a couple years. This Norelco security light originally came with one similar to this, but the lamp arrived broken. Since it was the only one of it's type I'd seen, I held onto it.
This particular lamp is slightly older than the first one I had. Unfortunately the part of the etch where the date code would be is smudged and unreadable, so I can't date it exactly. It does have a nickel base, with engraved 1-12 for marking the installation month, and 74-79 for the installation year, similar to the bases on these 1972 cleartop mercury lamps. I have a 1976 clearband mercury lamp that has the more common JFMAMJJASOND 1234567890 engraved on the base, leading me to believe this lamp was made closer to 1974.

IMG_1893.JPG IMG_1880.JPG IMG_1871.JPG IMG_1841.JPG

Light Information

Light Information

Manufacturer:GTE Sylvania
Model Reference:ULX-150
Lamp
Lamp Type:High Pressure Sodium
Base:Mogul Screw (E39)
Shape/Finish:BT-28
Fixture
Ballast Type:H39 HX
Electrical
Wattage:150
Physical/Production
Factory Location:USA

File information

File information

Download: Download this File
Filename:IMG_1871.JPG
Album name:icefoglights / HID Lights
Keywords:Lamps
File Size:877 KB
Date added:Mar 31, 2011
Dimensions:2048 x 1536 pixels
Displayed:3140 times
Date Time:2011:03:31 15:38:09
DateTime Original:2011:03:31 15:38:09
Exposure Bias:0 EV
Exposure Time:1/60 sec
FNumber:f 2.6
Flash:Red Eye, Auto-Mode
Focal length:5.8 mm
Make:Canon
Model:Canon PowerShot A540
White Balance:0
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-53105
Favorites:Add to Favorites
Comments
joseph_125
Sr. Member
****
Offline

Gender: Male
Posts: 394
View Gallery


GoL
View Profile Personal Message (Offline)
Mar 31, 2011 at 09:24 PM Author: joseph_125
Nice lamp! I noticed that some GTE Sylvania lamps have a extra date code where the stem press is.
I wonder if yours has one?
icefoglights
Hero Member
*****
Offline

Gender: Male
Posts: 646
View Gallery

ITT Low Pressure Sodium NEMA


GoL
View Profile Personal Message (Offline)
Mar 31, 2011 at 09:33 PM Author: icefoglights
I looked and there's none on there. All of my 70s GTE Sylvania lamps have the date code on the etch, while my 80s and early 90s ones have it engraved in a tab by the stem press or engraved into the base.

Another thing that may help is that this lamp actually says GTE Sylvania on the etch.

01010010 01101111 01100010 01100101 01110010 01110100

don93s
Sr. Member
****
Offline

Gender: Male
Posts: 425
View Gallery


View Profile Personal Message (Offline)
Mar 31, 2011 at 10:16 PM Author: don93s
My 70's Sylvania MV lamps all say GTE while the 80's ones don't, so I would believe that's a good indicator of 70's lamp. Cool find!
James
Full Member
***
Offline

Gender: Male
Posts: 156
View Gallery


View Profile WWW Personal Message (Offline)
Apr 01, 2011 at 11:39 AM Author: James
This is indeed an early model of the Unalux lamps, nice find! The later versions (since early 1980s) had a much more open pitch on the starting coil around the arc tube.
Silverliner
Administrator
Hero Member
*****
Offline

Gender: Male
Posts: 705
View Gallery

Verd a ray classic.


GoL
View Profile Personal Message (Offline)
Apr 01, 2011 at 02:33 PM Author: Silverliner
Very nice! The GTE SYLVANIA name on the etch indicates a date of appromixately '73-'75, although for the Unalux more like '74-'75.

May all the great lighting technologies have their place in history.

Administrator of Lighting-Gallery.net. Need help? PM me.

icefoglights
Hero Member
*****
Offline

Gender: Male
Posts: 646
View Gallery

ITT Low Pressure Sodium NEMA


GoL
View Profile Personal Message (Offline)
Apr 01, 2011 at 03:24 PM Author: icefoglights
Thanks for the info! The broken Unalux I had did have the finer coiled wire with a more open spiral around the arc tube. I think it was made sometime between the late 70s and 1980, but since the bulb was broken, and the date code was on the bulb, I couldn't tell exactly when.

01010010 01101111 01100010 01100101 01110010 01110100

ace100w120v
Hero Member
*****
Offline

Gender: Male
Posts: 681
View Gallery


View Profile Personal Message (Offline)
Nov 11, 2012 at 04:55 PM Author: ace100w120v
How will this work on a CWA or CWI ballast?
dor123
Hero Member
*****
Offline

Gender: Male
Posts: 2584
View Gallery
Other loves are computers, office equipment, A/Cs


View Profile WWW Personal Message (Offline)
Nov 11, 2012 at 11:33 PM Author: dor123
ace100w120v: By using an unsaturated sodium vapour inside the arctube.
HPS retrofits for mercury lamps that have unsaturated sodium vapour, are optimised for CWA and CWI ballasts, and the ones that have saturated vapour, are suited for mercury chokes.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

Solanaceae
Hero Member
*****
Offline

Gender: Male
Posts: 1590
View Gallery

All photos are brought to you by Bubby industries.


GoL Solanaceae.Keif.Fitz Keif Fitz bubby_keif
View Profile Personal Message (Offline)
May 06, 2015 at 06:42 AM Author: Solanaceae
Nice, I wonder if they make them for 100w ballasts?

Me💡Irl
My LG Gallery
My GoL Gallery

ace100w120v
Hero Member
*****
Offline

Gender: Male
Posts: 681
View Gallery


View Profile Personal Message (Offline)
May 06, 2015 at 09:48 AM Author: ace100w120v
I've never heard of one, though I think other wattages are made. (higher that is).
© 2005-2019 Lighting-Gallery.net | Powered by: Coppermine Photo Gallery