Update: Here is a closeup picture of the arctube of the lamp with flash enabled, to show that dirt in the arctube.
What it is?

@Medved - A bare 1pps (1Hz) signal from GPS receiver in fact exhibits relatively high jitter, you will have hard times extract a momentary precision of say, better than 10^-5. Especially on cheap receiver modules. More in a modern world, where GPS jamming has become a norm ( Sure, there are GPSDO's, GPS disciplined oscillators, where 1pps is used to calibrate an ovenized quartz oscillator by means of a very slow PLL. But nourishing a GPSDO is quite a rabbit hole by itself, see these long threads on eevblog, worth hundreds of pages

May be a time to look for a rubidium atomic standard in a good shape... A nice purple rubidium lamp inside, btw

Since the Christmas season is coming up pretty soon, I have been toying with the idea of having a very elaborate Christmas light display at my dream house.

The setup includes the following:

Christmas tree forest in the front yard with incandescent C9 strings of different color patterns on each tree in the forest. Some trees would use incandescent lamps, other trees would use LED retrofit lamps like the Wintergreen OptiCore lamps. Each tree would also have ornaments throughout the branches

Walkways lined with incandescent C9 strings fitted with stakes with some walkways having different color patterns. Some would use incandescent lamps and others would use LED retrofit lamps.

Roof and windows lined with incandescent C9 strings having different color patterns with some windows using incandescent lamps and others using LED retrofit lamps.

Inside the house would have multiple Christmas trees with LED retrofitted incandescent C9 strings.

My tastes may change over time depending on what I am in the mood for.

If you have a dream Christmas light setup, share your ideas here.

Yes I'm not sure what the role of them actually is in this EM module, and why they didn't just use plastic film caps originally? I have another identical EM 36 ST that I changed the same caps in last year, and that is fitted in this fitting which seemed to work ok when tested.

Looking for a Cooper OVD refractor as the lens I purchases arrived broken. Can do trades too.

I just find it strange that Japan sometimes likes to do things differently than most other countries. That is why I honestly love importing lamps and lighting equipment from Japan.

Anyone willing to lend me a Cooper OVD refractor? I had purchased a Westinghouse Holophane Endural refractor and it arrived broken into several chunks and small pieces.

https://youtu.be/cNv-3opP8pk

In this video you'll find a workflow for casting your own aluminium parts. This guy is making pretty high quality parts by 3d printing a copy and then making a sand mold from that. Also a bunch of outdoors lamps.

In the EM36ST i am thinking what is the actual role of those capacitors in the circuit ?

If the capacitor sees HF applied to it, then it is important to not exceed its ripple current ratings. Provided that PHE850 have about 10 times lower loss angle (tan d) than PME271, you have likely upgraded the ballast and won't have any issues

If the capacitor sees lamp ignition voltage peaks that reach its max ratings, then it may be more complicated because each capcitor type may react differently

I've noticed that the arctube of my Aliexpress 70W 10000K MH lamp is very dirty: https://www.lighting-gallery.net/gallery/displayimage.php?pos=-263254
What is all that dirt?