Got my paracord from the exact same supplier. We do not camp in the wilderness but on family campsites. Often there is quite some ambient light from the facilities there. Maybe there was to much ambient light for the GITD paracord to actually work/be visible?
Are those beads large enough for the paracord to ge through?
BTW, do you guys use Paracord as guy lines? At paracord.eu it says “Can shrink 5-10% by wetness”. Which is not ideal for a guy line I would say…
It’s fine. By the very nature of the stuff, it’s built with stretch in mind.
The ambient light may have been an issue, but what light source did you use to illuminate the cord? The UV light I use is pictured above in the background. Most common flashlights wouldn’t induce the same intensity of glow, as they are in wrong spectrum. Sorry for mentioning it if you already know… I haven’t read through the whole thread.
Yep, two strands can easily fit… maybe three if you force it in there.
And as for the paracord, it’s all I’ve ever used and never had an issue. You might need to re-stake after a good rain/stretch, but should stay taught after that. (Soak them prior to running your lines, to avoid re-staking)
On related matter: where can I get a shockcord that is both reflective and GITD, similar to what Nitecore uses in its NU25 UL headlamp?
Just had them laying around in the (scarce) sunlight. Will do some more testing once we are off for longer with the tent.
Won’t be using paracord for guyline though, since we have a ginormous tent with 10 or 12 guylines. I found the following for European users looking for reflective guylines: Polyester/Dyneema®-Kordel, Zeltleine, reflektierend, 2,5mm | buy online | extremtextil
However I do find everywhere that you shouldn’t put knots in Dyneema, I still think this is the strongest and best option regarding reflective guylines.
That’s mostly the case with the ‘naked’ braided Dynema such as Amsteel Blue because Dynema and Spectra fibers are Teflon-like slippery and most knots won’t hold well even at moderate loads. The cord you’re buying is a kernmantle construction with Dynema core and polyester sheath - most knots will be fine, though line may feel a little stiff compared with regular Nylon paracord. Another property of Dynema cords is their super low stretch - some 4% at break (Nylon would normally stretch more than 30% near the breaking load).
Reflective guy line This stuff is great. It’s perfect for your use. It’s an American company, but they do ship internationally. I don’t know what that would cost though, it may make it prohibitively expensive to order in smaller quantities.
That’s a good price!
I had heard people recommend Atwood rope for years, and I finally got around to ordering some. The price was good, the shipping was fast, and the quality of the micro cord and 550 cord I got seems to be very good. I would definitely recommend buying from them.
It’s nice to have visible guy rope for the tent.
Alternatively, you can tie pieces of white plastic bags on to the rope for more visibility.
Forgot to update, the GITD lineloks were okay. Remarkably, the glow in the dark tops on the naturehike “nail” type tent pegs was at least as good, possibly better. Between glowing peg and “floating” Lineloks, it was easy enough to avoid the lines. With a single glowing point, it is difficult to determine the direction of the lines.
I’ve now fallen down a rabbit hole of photoluminescent materials, seems like you really do get what you pay for, I’ve found there are classifications for glow longevity under test DIN 67510: mcd/m2 measurements are taken at 10 minutes and 60 minutes, values correspond to the “grade” of the material, increasing alphabetical letters are more glowy. I’ve found very few places with Class E, and it’s expensive 
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Link to a website with the values for each classification, Class E is missing
Jessup films seem to have one of the brightest products (7825 product) but I’ve not found a supplier in UK/Europe, it’s very difficult to find as 25 to 50mm wide short rolls, it’s very expensive.
I’m planning on building some TritiLEDs for exactly that purpose. They should run for years on CR2032.
Ah, thanks for another project I now want to start(!). Not sure I’ve the skills to finish one of these, will have to think about it.
The concept reminds me of the Lamplighter keychain project on candlepowerforums a long time ago, unfortunately most of the image links are now dead.
I don’t have Eagle but my friend will be converting the source files to KiCAD for me, ideally I’d like to make a version compatible with JLCPCB’s SMT assembly that could be semi-mass produced. No way I’m hand-assembling 20 of these which is the ideal number 
I’ll share my files if it pans out.
Yesterday i’ve stumbled upon rechargeable fishing chemlight replacements on Ali so i’ll be testing those. If the runtime hits at least 8 hours it’s a win for me since i rarely spend more than one night at any given location anyway. My use case is mostly finding my bivvy in the dark and not getting neglectfully murdered by drunk hunters (happens here). Chemlights do the trick so hopefully this works comparably well.
Those cells look terrifying, I’m interested in how these perform but I’m nervous about the correct charging algorithm etc
Same but tbh how much energy can one store? Low tens of mAh it seems and massive internal resistance to go along with it. I might order a bunch and short, burn and reverse charge some to assess their destructive power.