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Ceramic Metal Halide 250w Treated myself to this eBay Christmas present. This is a GE 250w CMH ConstantColor ceramic metal halide lamp. It’s now the largest ceramic arc tube lamp I have. The colour temperature is warm 3000K which is harder to find in other Halide lamps. This lamp came from another collection and carton is dated 16/12/04. It also claims to be suitable for HPS or halide gear. Keywords: Lamps

Ceramic Metal Halide 250w

Treated myself to this eBay Christmas present. This is a GE 250w CMH ConstantColor ceramic metal halide lamp. It’s now the largest ceramic arc tube lamp I have. The colour temperature is warm 3000K which is harder to find in other Halide lamps. This lamp came from another collection and carton is dated 16/12/04. It also claims to be suitable for HPS or halide gear.

Sharxs.jpg CMH35_par.jpg CMH250.jpg 4kW_repro2.jpg green_gec.jpg
Lamp/Fixture Information
Manufacturer:GE
Model Reference:CMH250/T/VBU/830/E40
Lamp
Lamp Type:Halide
Filament/Radiator Type:CERAMIC
Base:E40
Shape/Finish:tubular
Burning Position:universal
Physical/Production
Factory Location:Hungary
File information
Filename:CMH250.jpg
Album name:Tuopeek / Metal-Halide
Keywords:Lamps
Filesize:120 KiB
Date added:24 Dec 2024
Dimensions:2400 x 1548 pixels
Displayed:587 times
DateTime Original:2024:12:24 15:14:43
Exposure Time:1/250 sec
FNumber:f/5.6
File Source:Digital Still Camera
Flash:No Flash
Focal length:27 mm
ISO:400
Model:NIKON D3400
Software:Adobe Photoshop Elements 2.0
White Balance:0
URL:https://trad-lighting.net/gallery/displayimage.php?pid=620
Favourites:Add to Favourites

Comment 1 to 6 of 6
Page: 1

Ria   [Wed 25 Dec 2024 at 16:10]
Nice one, got some stuff to come from Photon when we can get to meet up, too fragile to trust to the postal system, so watch this space..!
Tuopeek   [Wed 25 Dec 2024 at 20:19]
Excellent, its great there are enthusiastic collectors like yourselves out there saving this stuff. Museums don't seem to be interested any more. Once its gone, its gone.
Ria   [Thu 26 Dec 2024 at 00:37]
Yeah, just worrying what to do with it all when I pop my clogs, not getting any younger and I was hoping a museum would be interested in some of the rarer stuff at least, but it doesn't look like it Sad bulb icon
Max   [Tue 31 Dec 2024 at 09:16]
Nice, and it's already a piece of lighting history. I remember when GE introduced them in the early 2000s, I managed to get both 250 and 400 W models. I was not aware they were designed for both high-current HPS and low-current MH/HPM (European) ballasts though... I will have to test them when I get back home, but I'm sure there will be some minimal CCT change given their burner design.
Tuopeek   [Tue 31 Dec 2024 at 12:02]
Indeed Max I jumped at this lamp thinking it was a must have, given it's one of the last HID developments. Great you have both this and the 400W version. I still see these for sale at time but with quite high price tags. I've noticed a few halides say either HPS or MH ballasts but I do think the HPS ballasts must be quite hard on the lamp. I've seen a few slightly bulging arc tubes from halides on SON gear in the past.
Max   [Fri 03 Jan 2025 at 11:23]
The HPS ballast is definitely harder on MH lamps, causing a significant reduction of their service life. I remember that while you can expect a 20 kh service life till 50 % failure from Philips HPI(-T) Plus lamps on mercury lamp ballasts, that figure drops to about 12 kh at the higher current of sodium lamp ballasts.

Comment 1 to 6 of 6
Page: 1