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Philips 100 watt mercury lamp

Philips 100 watt mercury lamp

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April 1987 or April 2007? Not sure but this thing definitely has high hours on it. Arc tube is black and when fully lit just gives off an eerie greenish glow. I'm just not sure if this is an old lamp from 1987 and is still going today or if it is a cheaply made lamp from 2007 that has already dimmed out... My guess is the latter of the two

Comb27082018104052.jpg 20180825_115419.jpg 20180821_032057.jpg 20180731_182336.jpg

Light Information

Light Information

Manufacturer:Philips
Model Reference:H38MP-100/DX
Lamp
Lamp Type:Mercury Vapor
Filament/Radiator Type:Quartz Arc Tube
Base:Medium E26
Shape/Finish:A23
Electrical
Wattage:100 Watt
Physical/Production
Fabrication Date:April 2007

File information

File information

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Filename:20180821_032057.jpg
Album name:GEm1000 / Lamps
Keywords:Lamps
File Size:1435 KB
Date added:Aug 21, 2018
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Date Time:2018:08:21 03:14:08
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Make:samsung
Model:SM-S550TL
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sox35
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missriaelaine
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Aug 21, 2018 at 04:51 AM Author: sox35
I haven't seen a lamp with this bulb shape for a while, so it doesn't look recent. However older ones didn't have the Hg marking on the etch either, so this one's a mystery to me.

Ria in Aberdeen
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Cal
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Bottled lightning


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Aug 21, 2018 at 05:02 AM Author: Cal
No shield icon would suggest later, but then again I think Philips didn’t always use the shield on their lighting products?
rjluna2
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Robert


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Aug 21, 2018 at 05:17 AM Author: rjluna2
With the Hg symbol, it is definitely April 2007 vintage.

Pretty, please no more Chinese failure.

sox35
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missriaelaine
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Aug 21, 2018 at 06:01 AM Author: sox35

With the Hg symbol, it is definitely April 2007 vintage.

Interesting, I've not seen this bulb shape on mercury lamps since the 1970's, at least not in the UK.

Ria in Aberdeen
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HU112
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Chester


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Aug 21, 2018 at 06:29 AM Author: HU112
These A23-shaped MV bulbs are pretty common in the USA.

No more cheapy crappy Chinese junk, please.

sox35
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missriaelaine
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Aug 21, 2018 at 06:31 AM Author: sox35

These A23-shaped MV bulbs are pretty common in the USA.

Thanks, I've learnt something new today

Ria in Aberdeen
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joseph_125
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Aug 21, 2018 at 08:31 AM Author: joseph_125
Yeah, they were common back in the day in recessed downlights like this one:


There's still some around to this day too.
sox35
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missriaelaine
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Aug 21, 2018 at 08:43 AM Author: sox35
The only lamp I've seen with a similar bulb shape is this one that dates back to 1955. They phased out this shape of bulb for mercury lamps in the 70's over here, as the elliptical shape proved better for maintaining an even temperature across the outer envelope surface.

Ria in Aberdeen
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joseph_125
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Aug 21, 2018 at 08:58 AM Author: joseph_125
Of the big three lamp makers here, Sylvania phased out their A shaped MV lamps a while back. GE seems to have phased them out fairly recently and it's still listed on Philips's web catalogue. All three still list the ED-17 version of that lamp though. I'm not exactly sure why they kept the A shape for so long. I've read reports that they made them in the A shape to better resemble the 150w incandescents that these replaced.

I also managed to get one of those 80W Philips HPL lamps that you linked. I have yet to run mine though.
sox35
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missriaelaine
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Aug 21, 2018 at 09:00 AM Author: sox35

Of the big three lamp makers here, Sylvania phased out their A shaped MV lamps a while back. GE seems to have phased them out fairly recently and it's still listed on Philips's web catalogue. All three still list the ED-17 version of that lamp though. I'm not exactly sure why they kept the A shape for so long. I've read reports that they made them in the A shape to better resemble the 150w incandescents that these replaced.

I also managed to get one of those 80W Philips HPL lamps that you linked. I have yet to run mine though.

They're wonderful, they go a lovely pink colour immediately after startup

Ria in Aberdeen
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GEm1000
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Aug 21, 2018 at 11:32 AM Author: GEm1000
Thanks for the info everyone, yes I figured it'd be from 2007 but with the way it glows so dimly at full brightness, you'd think it was an older lamp that has seen many hours
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Mike McCann


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Aug 21, 2018 at 05:43 PM Author: streetlight98
Yeah 2007 but still a cool lamp. The A-shape mercs are still made (at least by Plusrite) but are not popular. They were used in recessed cans like Joe mentioned and also post top lights. I'm surprised this dimmed out so badly and didn't just simply go out like a lot of modern mercs do. Apparently Philips found a way to speed up the dimming of the lamp? Modern MVs seem to be made so far out of spec it's amazing there are still people out there buying them brand new in 2018. You'd think after 15 years of almost across-the-board junk MV lamps the few people still using MV fixtures would have given up. Fortunately they haven't, apparently, as the lamps are still made.

Please check out my newly-updated website! McCann Lighting Company is where my street light collection is displayed in detail.

joseph_125
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Aug 21, 2018 at 07:28 PM Author: joseph_125

They're wonderful, they go a lovely pink colour immediately after startup


Good to know.

I actually wonder how new people still buy brand new mercury lamps. Especially the wattages more common for commercial use. The remaining indoor MV installations I've seen look like they haven't been relamped in years. I still see recessed 175w cans with 1980s or older BT28 cleartop lamps. Personally If I had to relamp a mercury installation using only newly made lamps. I'd probably get some Eye/Iwasaki lamps or Sylvania lamps.
streetlight98
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Mike McCann


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Aug 21, 2018 at 08:09 PM Author: streetlight98
Agreed. Eye being first choice with Sylvania being second. Othe than that is try to search for nos lamps on eBay lol

Please check out my newly-updated website! McCann Lighting Company is where my street light collection is displayed in detail.

sox35
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missriaelaine
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Aug 22, 2018 at 04:39 AM Author: sox35

Agreed. Eye being first choice with Sylvania being second. Othe than that is try to search for nos lamps on eBay lol

I'll second that, certainly as far as newer lamps are concerned, but my first choice will always be anything British made, particularly Thorn and GEC.

Ria in Aberdeen
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Preserving the Brightest Ideas of Our Age


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Aug 27, 2018 at 06:26 PM Author: Globe Collector
I have some Westinghouse H38MP-100/N's ...they came from Bollard Lighting used at a public building, they have the same A23 bulb and slightly yellowish phosphor that I think contains Cerium-IV.

Manufactured articles should be made to be used, not made to be sold!

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