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Ongoing test with an HID uplighter This picture shows the business end of the HID uplighter I designed and built for my study room at home. This luminaire originally contains three high-pressure discharge lamps: a Philips CDM-tm 20W/830 (not shown here), an Osram HQI-TS Excellence 150W/D (center), and a 100 W UHP burner mounted in a quartz jacket (right). Such combination enables the production of white light over a wide color temperature range, made possible by their independent control. The HQI-TS and the UHP are driven with dimmable ballasts, which enables even more flexibility. The UHP burner emits UV-A and -B radiation which, combined with the other lamps, enables the production of artificial daylight, which is useful to compensate for the many dark and rainy days that we have here in the Netherlands. I am now testing a modified configurations because I found that the produced light lacks some "solar" quality. More specifically, the spectrum lacks in orange and red. To remedy this problem, I first tested the addition of a 50 W SDW-TG white sodium lamp to the system. While this approach worked well, I could not integrate the lamp in the already crowded luminaire. The next best thing is the Philips CDM-TC Warm, which was designed precisely as an energy-efficient alternative to the SDW. While the compact metal halide lamp can be integrated in the system, its wattage (70 W) is just too great for the intended application and Philips never made a 35 W variant of it. I eventually found a solution while experimenting with the thermal balance of HID lamps. I found that by adding an insulating sleeve around the lamp and a side aluminum mirror so as to return some radiant energy back to the burner it is possible to run the lamp satisfactorily on a CDM 35W ballast. The lamp assembly can be seen during operation on the left side of the Osram HQI-TS. So far I have been using this configuration since April this year, and I am really happy with the result. The next step will be the full integration of the modified CDM-TC Warm 70W and its 35 W ballast to the system. Keywords: Miscellaneous

Ongoing test with an HID uplighter


This picture shows the business end of the HID uplighter I designed and built for my study room at home. This luminaire originally contains three high-pressure discharge lamps: a Philips CDM-tm 20W/830 (not shown here), an Osram HQI-TS Excellence 150W/D (center), and a 100 W UHP burner mounted in a quartz jacket (right). Such combination enables the production of white light over a wide color temperature range, made possible by their independent control. The HQI-TS and the UHP are driven with dimmable ballasts, which enables even more flexibility. The UHP burner emits UV-A and -B radiation which, combined with the other lamps, enables the production of artificial daylight, which is useful to compensate for the many dark and rainy days that we have here in the Netherlands.

I am now testing a modified configurations because I found that the produced light lacks some "solar" quality. More specifically, the spectrum lacks in orange and red. To remedy this problem, I first tested the addition of a 50 W SDW-TG white sodium lamp to the system. While this approach worked well, I could not integrate the lamp in the already crowded luminaire. The next best thing is the Philips CDM-TC Warm, which was designed precisely as an energy-efficient alternative to the SDW. While the compact metal halide lamp can be integrated in the system, its wattage (70 W) is just too great for the intended application and Philips never made a 35 W variant of it. I eventually found a solution while experimenting with the thermal balance of HID lamps. I found that by adding an insulating sleeve around the lamp and a side aluminum mirror so as to return some radiant energy back to the burner it is possible to run the lamp satisfactorily on a CDM 35W ballast. The lamp assembly can be seen during operation on the left side of the Osram HQI-TS. So far I have been using this configuration since April this year, and I am really happy with the result. The next step will be the full integration of the modified CDM-TC Warm 70W and its 35 W ballast to the system.
DSC_6757.jpg Philips_MLR_160W.jpg UHP50_and_wine.jpg _DSC2301.jpg Philips_PLE23-CPro.jpg
Lamp/Fixture Information
Manufacturer:Me
Model Reference:SAD Buster 3000 (to become 4000 after modification)
Lamp
Lamp Type:Ceramic metal halide and ultra high pressure mercury
File information
Filename:DSC_6757.jpg
Album name:Max / Misc lamps and lighting
Keywords:Miscellaneous
Filesize:1296 KiB
Date added:10 Oct 2024
Dimensions:1500 x 1201 pixels
Displayed:830 times
Software:Adobe Photoshop CS2 Windows
URL:https://trad-lighting.net/gallery/displayimage.php?pid=553
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Comment 1 to 15 of 15
Page: 1

Sammi   [Fri 11 Oct 2024 at 11:14]
We get a lot more dark and rainy days up here.!
Max   [Mon 14 Oct 2024 at 20:40]
So, you need more light then Wink
Sammi   [Wed 16 Oct 2024 at 00:24]
We do, do you know somewhere we can get an uplighter from.? Wonder
Max   [Wed 16 Oct 2024 at 20:16]
Maybe e-bay would be a good start, especially if you're looking for a halogen luminaire to convert to HID.
Sammi   [Wed 16 Oct 2024 at 21:24]
Actually we do know somebody who can do the work, and we'd be willing to cover the costs of his hard work... Wink
Max   [Sat 19 Oct 2024 at 11:56]
What about the pleasure of finding things out and and making stuff? You definitely have the capacity and competence to convert a halogen uplighter to MH. For that I would recommend the fantastic little Osram's HQI-TS Excellence 70 or 150 W/D. Or go for a Philips CDM-TD 70 or 150W/942 if the 5400 K of the HQI is too harsh for you. The advantage of building this luminaire yourself is that you can play with lamps and see exactly what works and what doesn't in your specific environment and with your particular taste in light Wink
Ria   [Sat 19 Oct 2024 at 16:58]
That's probably true, but we don't have the space. To do this sort of thing you need a workshop, or at the very least a dedicated bench area, we have neither, we are in a very small 1-bedroom flat which is already crammed full of stuff Confused
Max   [Sat 19 Oct 2024 at 21:29]
I've build my all my luminaires on the corner of my kitchen table... I'm sure you could do the same.
Ria   [Sat 19 Oct 2024 at 21:30]
Except we don't have a table in the kitchen Laughing

We'll think of something Razz
Max   [Sat 19 Oct 2024 at 21:32]
Where do you eat? and more interestingly, where did you build your nice ballast breadboards?
Ria   [Sat 19 Oct 2024 at 21:41]
We generally eat in the living room from a small collapsible table, the kitchen is really only big enough to cook in. We do have a small workbench, but it's usually cluttered with stuff..! We'll manage.
Max   [Sat 19 Oct 2024 at 21:47]
Workbench - check Wink
Sammi   [Sun 20 Oct 2024 at 14:56]
The workbench has been clear once, just after I'd finished building it.... Cool
Since then not so much.! Rolling Eyes Laughing
Max   [Sun 20 Oct 2024 at 15:12]
Time for a miracle, then lol
347vPowerlite   [Sun 10 Nov 2024 at 03:04]
Amazing! I considered doing something like this but something a bit more simple, with a 70w or so 4000K for daytime and a 20w 3000K lamp for the evenings. I opted for a simpler compact gumball with a retrofit to use 39w 3000K CMH lamps instead. Still looks great though.

And I wish I had a large workshop with machining equipment for my lighting projects. Most of my projects are done on a small workbench in the garage that's currently cluttered with too much stuff.

In my area there are places called makerspaces, some of which are large workshops you can apply to be a member of. Some are pretty well equipped too, with equipment like metal lathes, milling machines (manual and CNC), 3D printers, laser engravers, etc. I debated joining but didn't feel like I'd use it enough to justify the $70-80 dollar monthly fee.

Comment 1 to 15 of 15
Page: 1