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70w Philips MHN-TD: China vs Belgium Comparing two 70w Philips MHN-TD lamps from different eras. Top is a Chinese model with a date code of M3 and the bottom is a Belgian example with a code of 1F. Some substantial differences going on, the most obvious being the shape of the arc tube!

70w Philips MHN-TD: China vs Belgium

Comparing two 70w Philips MHN-TD lamps from different eras.

Top is a Chinese model with a date code of M3 and the bottom is a Belgian example with a code of 1F.

Some substantial differences going on, the most obvious being the shape of the arc tube!

387A5051.JPG 387A4601.JPG 387A3629.JPG Photo_28-10-20252C_19_24_29_281429.jpg IMG_0461.jpeg
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Filename:387A3629.JPG
Album name:FrontSideBus / HID: Metal Halide
Filesize:10130 KiB
Date added:15 Apr, 2026
Dimensions:3640 x 2048 pixels
Displayed:47 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=24556
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dor123   [16 Apr, 2026 at 06:11 AM]
I've the Chinese one in 730 and 740, and these requires slightly more than 5 mins to restrike. The Belgium one may take 2-3 mins to restrike.
AngryHorse   [16 Apr, 2026 at 08:25 AM]
Interesting, didn’t know they put UV block on quartz lamps Shocked
FrontSideBus   [16 Apr, 2026 at 02:10 PM]
I'm not sure if the older one had it?
dor123   [17 Apr, 2026 at 07:26 AM]
When the UV blocking coating was invented?

Comment 1 to 4 of 4
Page: 1

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