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250W SW Clarke self-ballasted mercury-halogen lamp - lit

250W SW Clarke self-ballasted mercury-halogen lamp - lit

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I posted a picture of this lamp when I first got it last year, but realised the other day I'd never uploaded a photo of it lit, so here it is. Although sold and described as a metal halide lamp, this is in fact a standard mercury vapour arc tube in series with a halogen filament for ballasting.

20190909_194702.jpg 20190910_183506.jpg DSC02615.JPG DSC02617.JPG

Light Information

Light Information

Manufacturer:Unknown, but branded SW Clarke
Lamp
Lamp Type:Halogen-ballasted mercury vapour lamp
Filament/Radiator Type:Halogen filament ballast, quartz arc tube
Base:GES (E40)
Shape/Finish:Tubular
Electrical
Wattage:250
Voltage:220-240
Physical/Production
Factory Location:China (grrr)

File information

File information

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Filename:20190909_194702.jpg
Album name:sox35 / Mercury Vapour lamps
Keywords:Lamps
File Size:204 KB
Date added:Sep 12, 2019
Dimensions:1386 x 2464 pixels
Displayed:68 times
Date Time:2019:09:09 19:47:02
DateTime Original:2019:09:09 19:47:02
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Focal length:3.3 mm
ISO:40
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Model:SM-G800F
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HomeBrewLamps
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SodiumVapor 105843202020668111118 UCpGClK_9OH8N4QkD1fp-jNw majorpayne1226
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Sep 12, 2019 at 09:35 AM Author: HomeBrewLamps
Where could I get one of these? Cool lamp.

~Owen

Mercury Vapor LampHigh Pressure Sodium Scavenger, Urban Explorer, Lighting Enthusiast and Creator of homebrewlamps Cool High Pressure SodiumMercury Vapor Lamp

sox35
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Sep 12, 2019 at 09:40 AM Author: sox35

Where could I get one of these? Cool lamp.

They're on eBay UK, see here. For some reason they are described as metal halide rather than mercury, I've told them about it more than once and also informed eBay they are being mislabelled but nothing has been done. Even though they're made in China (grrr) they're still interesting enough for me to want to get a couple. The listing here is for the 400W version but they have 250W ones as well.

Ria in Aberdeen
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WestinghouseCeramalux
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Sep 12, 2019 at 10:10 AM Author: WestinghouseCeramalux
Interesting lamp. Would be cool if it really was a self-ballasted MH lamp! Leave it to the Chinese to be disingenuous.

Your mission - should you choose to except it - is to save unique and rare HID lighting before it's all scrapped.

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Sep 12, 2019 at 10:18 AM Author: sox35

Interesting lamp. Would be cool if it really was a self-ballasted MH lamp! Leave it to the Chinese to be disingenuous.

I'm trying to work out how you would actually make one. Maybe a glowbottle starter would work, as in some HPS mercury retrofit lamps..? Never seen anything though, if it was possible/commercially viable someone would have come up with it by now, I would have thought.

Ria in Aberdeen
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Sep 12, 2019 at 10:36 AM Author: dor123
You can only make a self-ballasted MH lamp using an integrated electronic ballast. MH lamps requires shorter 0V period, and with a tungsten ballast filament, it would extinguish before reaching full output.

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.

sox35
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Sep 12, 2019 at 10:37 AM Author: sox35
I was thinking along those lines. But has anyone ever actually made one..?

Ria in Aberdeen
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Sep 12, 2019 at 11:50 AM Author: dor123
1. http://www.lamptech.co.uk/Spec%20Sheets/D%20MHQ%20GE%20First%20Light.htm, http://www.lamptech.co.uk/Spec%20Sheets/D%20MHQ%20GE%20Electronic%20Halarc%20Clear.htm
2. http://www.lamptech.co.uk/Spec%20Sheets/D%20MHC%20Philips%20CDMRi25.htm

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.

sox35
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Sep 12, 2019 at 11:56 AM Author: sox35
Interesting. Yes, I remember seeing that Halarc one on James's site, they didn't last long in production though, as CFL's were just coming onto the market at the time.

Ria in Aberdeen
It'll be all right in the end, and if it isn't all right, it isn't the end  Smiley

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Robert


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Sep 12, 2019 at 12:33 PM Author: rjluna2
It would be nice to have it for the 120 Volts 60 Hz realm, but it would be too complex to use preheater filaments and bimetallic strip in that circuit

Pretty, please no more Chinese failure.

sox35
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Sep 12, 2019 at 01:08 PM Author: sox35

It would be nice to have it for the 120 Volts 60 Hz realm, but it would be too complex to use preheater filaments and bimetallic strip in that circuit

It's self-ballasted, just use a step-up transformer, I thought you guys had split phase with 120/240V available..? My friend in San Francisco certainly has, although admittedly only for the washer/dryer in the basement.

Ria in Aberdeen
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Sep 12, 2019 at 01:13 PM Author: Lightingguy1994
I'm thinking you can still use this in 120v land. I heard you can use a multi tap HID ballast to upscale 120v to 240v or 277v by connecting the ballast to 120v normally and then using the 240 / 277 input tap as the output to power 240v things. For this lamp, you'd need to use a 400w HID with multi tap mains inputs that include 240v, 208v lead may also work
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Sep 12, 2019 at 01:14 PM Author: sox35
That might work, although I've no experience of that type of ballast, being over here in 240V-land.

Ria in Aberdeen
It'll be all right in the end, and if it isn't all right, it isn't the end  Smiley

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Sep 12, 2019 at 01:39 PM Author: dor123
The lamp won't reach full output when operated from a ballast: https://www.youtube.com/watch?v=-Bv59ee0OBE

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.

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Sep 12, 2019 at 01:55 PM Author: Lightingguy1994
Dor123, Im talking about using the ballast as a step up transformer only. Connecting 120v power to the 120v input lead, and then connect this lamp or anything that needs 240v into the 240 or 208 input lead. The primary of the ballast will upscale the 120 to 208 or 240v. Any other wires including lamp output are capped off.

Anyone trying that tries at their own risk and should measure voltage first
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Sep 12, 2019 at 02:15 PM Author: rjluna2

It's self-ballasted, just use a step-up transformer, I thought you guys had split phase with 120/240V available..? My friend in San Francisco certainly has, although admittedly only for the washer/dryer in the basement.

I haven't thought about that

Pretty, please no more Chinese failure.

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