About that 589nm line seen in some lamp spectrums. 589nm of course screams Sodium!!! loudly ) So it is easy to understand we can see a marker of ever-present sodium impurity, with it's very intense resonant radiation, likely from oxide coating, as the lamps discussed here are mostly NOS.

I was looking at the old AEL website on the Wayback Machine, and found the 110 series in the 'Security Lights' section, and was wondering if anyone knows if they were used by any utilities, or towns etc..., they have a European look to them, perhaps rebaged?

https://web.archive.org/web/20061019073125/http://www.americanelectriclighting.com/Products/Family.asp?Brand=AEL&Family=Series%20110&FID=

They do have a Spanish or Italian look to them I would say…

High of 85 (with 5% humidity) here today.
A coldfront is on the way for tonight which will drop temps back into the 60's tomorrow.

Yeah, private property would probably be the last hope, but that said, it seems like it was made to have better optics than a NEMA, but cheaper than a Cobra. Probably good for rural roadway lighting.

I've never seen one, but finding one would probably be futile since there are probably none left anymore.

And finally finally! This is a nitrogen spectrum. This tube was deliberately filled with circa 3mmHg of air to demonstrate so called chemical nitrogen afterglow. I believe all of the oxygen was consumed now, so no more afterglow effect, but nitrogen still displays its funny spectrum. At first, one may thought there is some kind of interference on the camera, but no! There is none, and as a sanity check nitrogen spectrum shows the same banded spectrum also on my HP320 spectrometer and even in optical spectroscope. Molecular gases have complex electron interactions resulting in funny wide spectrums. A lot of UV is radiated, too!

And finally, some interesting offtopic on spectral investigations A crime case of some circa 2023 recent shitty Russian 36W T8 tube from my home, probably originated from Smolensk, but not branded Russian Osram. It got mercury starved and was replaced, but I kept the tube out of curiosity. It burns dim whitish with pronounced stirations. As you can see the spectrum shows near - 100% krypton fill, and no trace of any foreign molecular gas like oxygen or nitrogen. So it got really mercury starved, not leaked! You see only very weak  mercury lines and very weak phosphor excitation, as krypton has just a weak UV and at very short wavelengths, halo phosphor is insensitive to these. I do not have a starved argon tube yet to investigate, though.

 

Now! Gotcha! Rather old original Italian Osram FH 21W/840 *HE*! Here I 100% agree with @James listing. Dominant krypton lines with some weak argon lines. Krypton having lower ionization potential will dominate even at low percentage.

Also, my own handmade cold cathode tube with pure krypton as a spectral reference!

Rather recent Chinese Osram 24W/HO 840. Still no trace of Ne, some signs of alcali earths sputtering with glow discharge at 20mA.

Looks like we'll be hitting the 80's here tomorrow, close to the mid 80's... with the threat of storms tomorrow as well. Severe weather threat possible.
Then Monday it'll only be 48 degrees, probably cold night Monday night as well but I forget.
Sheesh man, the temperature swings...