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General => Dating & Specifications => Topic started by: Michael on August 29, 2024, 02:37:32 AM
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Hi all,
I just received a full box of new old stock EYE H125 PD-H lamps. I‘m wondering about their age. The date code is 99D. Could it be April 1999?
There is already the CE mark on the bulb.
Thank’s
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Nice find on the box of Eye mercury lamps! -H I think signifies hard glass too which is nice :)
as I understand Iwasaki datecodes, indeed they are pretty simple like that where the 2 digit number is the year and the letter is the month, so April 1999 indeed :)
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Thanks. ;)
So that means that these bulbs with /H will be suitable for open bowl less street light fixtures. Which means that the bulb will not crackle in wet/ snowy conditions like it does sometimes with soft glass 125W lamps.
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Thanks. ;)
So that means that these bulbs with /H will be suitable for open bowl less street light fixtures. Which means that the bulb will not crackle in wet/ snowy conditions like it does sometimes with soft glass 125W lamps.
Yes I belive so :) if you want you can verify the glass composition by looking at the glass to metal seals, if its a bright red colour (and also noticeably thinner then the wire either side of it) then its a soft-glass duemet wire seal, but if its a hard glass bulb it will have a thicker-tungsten wire seal which often looks black to yellow in colour, you can see a good comparison in this upload hard glass on the left, soft glass on the right :)
https://www.lighting-gallery.net/gallery/displayimage.php?pos=-198547
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Hello Michael,
many thanks to you for our lamp exchange.
I find it remarkable that these lamps have two starting resistors and not just one. I had not expected that.