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

Metal halide table lamp

Metal halide table lamp

Click to view full size image

Some of you have helped me with technicalities in building a metal halide table lamp. Here it is. I'm not sure the project is completely finished as I would like a different shade and other minor modifications. It has a Universal electronic ballast that doesn't get very warm, and a Philips 50W CDM lamp (unfortunately made in China). It is a very good light quality with excellent CRI nevertheless. At first I didn't like the 3000K colour but either it has burned in a bit or my eyes got used to it as it has a better appearance now.

The hardest part was mounting the lamp holder as I couldn't find a threaded pulse rated one. The second hardest part was finding a suitable lamp. Electrical suppliers in the area don't sell them in 50W anymore. I finally found one on eBay after buying two others and finding the CRI horrible for household use. Warmup is about one minute, and hot restrike is 2-3 minutes plus warmup. The harp finial gets warm but not burning to the touch by any means.

This lamp was meant as a work light on the kitchen table when doing paper work and then put back in storage afterwards. Since the CRI is so good, I have decided to put it on a small table between the living room and the kitchen and move it to the table when needed. It gets more regular use like that, too.

Many thanks to all who have helped in this project.

IMG_0936A.jpg IMG_6599.jpg montage.jpg Capture_d’écran_2016-03-29_à_21_27_23.png

Light Information

Light Information

Manufacturer:Me
Lamp
Lamp Type:M110 MH of 50 watts
Base:Medium
Service Life:Long
Fixture
Ballast Type:Electronic MH low frequency square wave
Electrical
Wattage:50W plus ballast losses
Optical
Color Temperature:3000K for now
Color Rendering Index:90+

File information

File information

Download: Download this File
Filename:montage.jpg
Album name:sol / Various
Rating (5 votes):
Keywords:Lanterns
File Size:329 KB
Date added:Apr 11, 2016
Dimensions:2465 x 1092 pixels
Displayed:383 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-119079
Favorites:Add to Favorites
Comments
Alights
Full Member
***
Offline

Posts: 129
View Gallery

USA (120V 60HZ)


View Profile Personal Message (Offline)
Apr 11, 2016 at 06:25 PM Author: Alights
awesome! now that is a proper MH table lamp unlike some others i have seen this is totally safe

Magnetic ballasts and old school electronic only zone!  No T8 instant start

sol
Hero Member
*****
Offline

Posts: 992
View Gallery

View Profile Personal Message (Offline)
Apr 11, 2016 at 07:19 PM Author: sol
Thanks. Oh, and I forgot to mention that the lamp is protected (open rated).

The ballast is not really mounted in the box in the base, but it is in contact with the metal so it should be heat sinked enough to survive. The box doesn't really get hot, only warmish. Someday, I should run it for a couple of hours and then open the ballast enclosure and measure the temperature with the thermometer gun, just to know what is the case temperature of the ballast.
tolivac
Sr. Member
****
Offline

Posts: 498
View Gallery

View Profile Personal Message (Offline)
Apr 11, 2016 at 11:38 PM Author: tolivac
Very Nice!!!Like this light.
dor123
Hero Member
*****
Offline

Gender: Male
Posts: 2443
View Gallery
Other loves are computers, office equipment, A/Cs


View Profile WWW Personal Message (Offline)
Apr 11, 2016 at 11:55 PM Author: dor123
2-3 mins of cooling down, is very short for a cylindrical arctbue CMH lamp. CMH lamps usually have 7-15 mins of cooling down before hot restrike.

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.

sol
Hero Member
*****
Offline

Posts: 992
View Gallery

View Profile Personal Message (Offline)
Apr 12, 2016 at 03:15 AM Author: sol
I find it short, too. The only explanation I have is that because of the lamp shade that is open on the top and on the bottom, it creates a convection that cools the lamp faster. The arc tube is ball shaped but the quartz MH I had before would cool down in the same amount of time also.
dor123
Hero Member
*****
Offline

Gender: Male
Posts: 2443
View Gallery
Other loves are computers, office equipment, A/Cs


View Profile WWW Personal Message (Offline)
Apr 12, 2016 at 04:02 AM Author: dor123
If the arctube is spherical, this is the reason for the short cooling down. I didn't know that Philips North America, also moved from cylindrical arctube to spherical arctube.

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.

rjluna2
Sr. Member
****
Offline

Gender: Male
Posts: 274
View Gallery

Robert


GoL
View Profile Personal Message (Offline)
Apr 12, 2016 at 05:22 AM Author: rjluna2
I guess I'm not the only person who convert the table lamp with MH bulb. Here is one posted at Table Lamp with 100W Metal Halide Lamp and Gear. See the bulb at General Electric 100W Metal Halide

Pretty, please no more Chinese failure.

Solanaceae
Hero Member
*****
Offline

Gender: Male
Posts: 1593
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 09, 2016 at 09:46 PM Author: Solanaceae
This looks great, nice work.

Me💡Irl
My LG Gallery
My GoL Gallery

socketgeek63
Newbie
*
Offline

Gender: Male
Posts: 12
View Gallery


TheDennisManNetwork photoelectric4863
View Profile Personal Message (Offline)
May 09, 2016 at 10:11 PM Author: socketgeek63
Quite an interesting retrofit for your table lamp!

Long live the great old 20th century quality in electrical & lighting products!

ace100w120v
Hero Member
*****
Offline

Gender: Male
Posts: 663
View Gallery


View Profile Personal Message (Offline)
May 09, 2016 at 11:23 PM Author: ace100w120v
Wow, that's a very neat setup! Have you ever considered running a 40/50w mercury lamp, with the ignitor disabled of course? (If you can do that on this ballast). CRI wouldn't be all that great for household use but it would sure have the "Cool" factor!
sol
Hero Member
*****
Offline

Posts: 992
View Gallery

View Profile Personal Message (Offline)
May 10, 2016 at 03:20 AM Author: sol
Thanks for the comments. I have no intention of using a MV lamp in this. I have an electronic ballast in there so it would be impossible on this ballast. I do have a 4000K lamp on order from eBay, though. I might use the 4000K in the summer and the 3000K in the winter, however.
Mercurylamps
Hero Member
*****
Offline

Gender: Male
Posts: 530
View Gallery

240V 50Hz


View Profile Personal Message (Offline)
May 10, 2016 at 04:16 AM Author: Mercurylamps
This looks awesome good job.




Posts:
View Gallery

View Profile Email
Jul 20, 2017 at 04:08 PM Author:
Metal halide lamp heats less than a halogen lamp?
sol
Hero Member
*****
Offline

Posts: 992
View Gallery

View Profile Personal Message (Offline)
Jul 24, 2017 at 05:54 PM Author: sol
In this case, yes. The actual surface temperature is quite hot but it doesn't radiate as much. In fact, I have a 35W CDM in a glass globe and I can touch the top part of the glass for a few seconds until it gets burning to the touch. I tried with a 100W incandescent and could not touch the glass as it was too hot immediately upon contact.




Posts:
View Gallery

View Profile Email
Jul 26, 2017 at 01:29 PM Author:
I understand, this happens in 35W automotive xenon bulbs, what's hot is not the glass bulb, but the built-in ignitor that is sealed with an aluminum cover. (Philips Xenstart D3S) Now trying to replace a 65W halogen bulb while it is hot is impossible.
© 2005-2019 Lighting-Gallery.net | Powered by: Coppermine Photo Gallery