Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « on: April 12, 2025, 04:29:46 PM » Author: Eleco_SR304
I was wondering if SLI/H bulbs are considered to be one of the rarest LPS bulbs, or even as rare as 50s fluorescent bulbs. If anyone is an expert about this, I would like to know, as only the Alpha 5s which I photographed used SLI/H bulbs, nowhere else.
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Usually I collect bulbs (Mostly LED) and some HID ones. I also own a couple of streetlights, but most are made in Poland.

However, I mostly prefer SOX bulbs. LED bulbs in their efficacy will never beat SOX bulbs, in my opinion.

	Re: Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « Reply #3 on: April 13, 2025, 01:49:52 AM » Author: Baked bagel 11
Thorn also had the alpha 6 sli lanterns, I also believe that the Z9554 was originally sli, but when SOX came along, in its higher wattages, GEC just added a 135w SOX version.
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The classic lights of Canberra are few and far between, this just means that I get know each one better!

	Re: Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « Reply #4 on: April 13, 2025, 03:09:47 AM » Author: Eleco_SR304
Oh yeah, the alpha 6. Quite surprising that GEC Z9554 used SLI/H bulbs. Is the 140w SLI/H bulb as long as the 200w SLI/H bulbs? And why didn't they make SLI/H bulbs as long as the 180w SOX/131w SOX-E bulbs or was it because the 180w SOX bulbs were made later so they thought about making 180w SOX bulbs long? And I don't want to change the subject but Mike Barford seemed to photograph a Alpha 6 in Essex https://www.streetlightonline.co.uk/Survivors/134AN.htm Still stand to today's day though!
« Last Edit: April 13, 2025, 03:12:48 AM by Eleco_SR304 »		Logged

Usually I collect bulbs (Mostly LED) and some HID ones. I also own a couple of streetlights, but most are made in Poland.

However, I mostly prefer SOX bulbs. LED bulbs in their efficacy will never beat SOX bulbs, in my opinion.

	Re: Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « Reply #5 on: April 13, 2025, 03:25:20 AM » Author: Baked bagel 11
That's nice that there's still an A6 in service! As for the lamp sizes, best to ask @James, I'd say he knows the most.
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The classic lights of Canberra are few and far between, this just means that I get know each one better!

	Re: Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « Reply #6 on: April 13, 2025, 03:27:23 AM » Author: Eleco_SR304
Seems @James is interested in bulbs...yes, maybe he knows the answer. Does he own any SLI/H bulbs? 60w, 140w, 200w?
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Usually I collect bulbs (Mostly LED) and some HID ones. I also own a couple of streetlights, but most are made in Poland.

However, I mostly prefer SOX bulbs. LED bulbs in their efficacy will never beat SOX bulbs, in my opinion.

	Re: Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « Reply #7 on: April 13, 2025, 03:40:32 AM » Author: Baked bagel 11
I believe he's a lamp engineer, working for Sylvania. I would regard him as the most knowledgeable member on this site about lamps.
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The classic lights of Canberra are few and far between, this just means that I get know each one better!

	Re: Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « Reply #8 on: April 13, 2025, 08:01:15 AM » Author: WorldwideHIDCollectorUSA
I also have some sort of bulkhead fixture designed for the 60W SLI/H low pressure sodium lamps. It uses a fluorescent glowbottle starter to ignite the lamp: https://www.lighting-gallery.net/gallery/displayimage.php?album=6271&pos=125&pid=190006 I am one of the few North American collectors who owns SLI/H low pressure sodium lamps and fixtures.
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Desire to collect various light bulbs (especially HID), control gear, and fixtures from around the world.

DISCLAIMER: THE EXPERIMENTS THAT I CONDUCT INVOLVING UNUSUAL LAMP/BALLAST COMBINATIONS SHOULD NOT BE ATTEMPTED UNLESS YOU HAVE THE PROPER KNOWLEDGE. I AM NOT RESPONSIBLE FOR ANY INJURIES.

	Re: Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « Reply #9 on: April 13, 2025, 08:10:09 AM » Author: Baked bagel 11
@WorldwideHIDCollectorUSA I don't believe your sli luminaire is soffit, to the best of my knowledge they were designed for surface mounting in underpasses.
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The classic lights of Canberra are few and far between, this just means that I get know each one better!

	Re: Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « Reply #10 on: April 13, 2025, 03:56:52 PM » Author: WorldwideHIDCollectorUSA
I understand that it was not its intended application, but I temporarily installed it in such a way that it acts like a soffit light that provides some uplighting.
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Desire to collect various light bulbs (especially HID), control gear, and fixtures from around the world.

DISCLAIMER: THE EXPERIMENTS THAT I CONDUCT INVOLVING UNUSUAL LAMP/BALLAST COMBINATIONS SHOULD NOT BE ATTEMPTED UNLESS YOU HAVE THE PROPER KNOWLEDGE. I AM NOT RESPONSIBLE FOR ANY INJURIES.

	Re: Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « Reply #11 on: April 16, 2025, 02:44:32 PM » Author: Eleco_SR304
Luck for you to own an SLI/H bulbs. These are probably (I think) one of the rarest LPS bulbs in the LPS bulb series...
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Usually I collect bulbs (Mostly LED) and some HID ones. I also own a couple of streetlights, but most are made in Poland.

However, I mostly prefer SOX bulbs. LED bulbs in their efficacy will never beat SOX bulbs, in my opinion.

	Re: Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « Reply #12 on: April 16, 2025, 05:03:58 PM » Author: WorldwideHIDCollectorUSA
I have had no luck with the older SO/H low pressure sodium lamps myself.
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Desire to collect various light bulbs (especially HID), control gear, and fixtures from around the world.

DISCLAIMER: THE EXPERIMENTS THAT I CONDUCT INVOLVING UNUSUAL LAMP/BALLAST COMBINATIONS SHOULD NOT BE ATTEMPTED UNLESS YOU HAVE THE PROPER KNOWLEDGE. I AM NOT RESPONSIBLE FOR ANY INJURIES.

	Re: Are SLI/H bulbs considered to be rare as 50s fluorescent bulbs? « Reply #13 on: April 16, 2025, 05:23:02 PM » Author: Eleco_SR304
The only luck I had was a SOX-E bulb that had a bidding. I paid £13.50 for it, quite cheap as the ones without biddings have like £80-£120. I have uploaded a image of my bulb. It is the first post on "Collection" album of mine.
		Logged

Usually I collect bulbs (Mostly LED) and some HID ones. I also own a couple of streetlights, but most are made in Poland.

However, I mostly prefer SOX bulbs. LED bulbs in their efficacy will never beat SOX bulbs, in my opinion.