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

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

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.

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