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Sylvania LU50 I got this from a older Rona Store in Montreal. Surprisingly they had quite a few HID lamps for sale. There's a little backstory behind this lamp, I first saw it back in 2014 (picture of shelf from 2014) and thought it was neat but didn't buy it. I was recently in Montreal again and I remembered the Rona store with a wide assortment of HID lamps and decided to check out their lamp section again. To my surprise almost all the lamps in the picture were still there including the Sylvania LU25 so I decided to buy it. Gotta love these BT25 lamps. Keywords: Lamps

Sylvania LU50

I got this from a older Rona Store in Montreal. Surprisingly they had quite a few HID lamps for sale.

There's a little backstory behind this lamp, I first saw it back in 2014 (picture of shelf from 2014) and thought it was neat but didn't buy it. I was recently in Montreal again and I remembered the Rona store with a wide assortment of HID lamps and decided to check out their lamp section again. To my surprise almost all the lamps in the picture were still there including the Sylvania LU25 so I decided to buy it. Gotta love these BT25 lamps.

DSC01059.jpg 06_25_IMG_0008.jpg 06_25_IMG_0002.jpg 06_25_DSC00525.jpg GEC_130W_Carbon_Heater_Lamp.jpg
Lamp/Fixture Information
Manufacturer:GTE Sylvania USA
Model Reference:LU50
Lamp
Lamp Type:High Pressure Sodium
Base:E39-Mogul
Shape/Finish:BT-25
Service Life:24000 hours
Electrical
Wattage:50w
Voltage:55v
Physical/Production
Factory Location:Manchester, NH, USA
Fabrication Date:August 1979
File information
Filename:06_25_IMG_0002.jpg
Album name:347vPowerlite / Lamps
Keywords:Lamps
Filesize:1356 KiB
Date added:24 Aug 2025
Dimensions:3072 x 1671 pixels
Displayed:430 times
DateTime Original:2025:07:01 10:29:58
Exposure Time:1/60 sec
FNumber:f/3.5
File Source:Digital Still Camera
Flash:Red Eye, Compulsory Flash
Focal length:13.037 mm
ISO:125
Model:Canon PowerShot G7 X Mark II
Software:Adobe Photoshop 21.1 (Windows)
White Balance:0
URL:https://trad-lighting.net/gallery/displayimage.php?pid=964
Favourites:Add to Favourites

Comment 1 to 6 of 6
Page: 1

Ria   [Sun 24 Aug 2025 at 23:36]
Always loved BT- lamps, perhaps it's because we never had them here HPS bulb HD
347vPowerlite   [Mon 25 Aug 2025 at 22:17]
Same here! The BT-25s are really rare to find here now, especially still in a store and not online. I'm surprised it stayed on the shelf all those years later.
Max   [Fri 05 Sep 2025 at 08:10]
Ria, we had BT-shaped lamps in Europe, those were certainly not nearly as common as in North America.
wide-lite 1000   [Sun 14 Sep 2025 at 20:14]
Great find !! I love this sleeve design !! I'd guess they don't sell too many HIDs anymore .
Maxim   [Wed 08 Apr 2026 at 23:05]
I have a couple of these myself... a Westinghouse equivalent as well. Top-notch construction quality. I would say, of the big 3, Philips and Sylvania remained on top 'til the end. GE got too busy meddling in international lighting industries (Hungary, UK...) to focus on the quality of their US output.
347vPowerlite   [Mon 13 Apr 2026 at 03:53]
Yeah, these Sylvania BT25 HPS lamps are great. It's too bad GE's quality slipped. Their fluorescent lamps were my favourite for a while, especially the older ones with the rounded endcaps.

Comment 1 to 6 of 6
Page: 1