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Carbon Arc was still used in Theater lighting and movie projectors until recent times. In fact, we were doing shows with Carbon Arc Super Troupers up through the 1990's. They were limited at that point to outdoor shows, but the light they produced (with the right operator) was beautiful. They were DC arc lamps, with very large rectifiers and chokes. We also had a few of their smaller brothers (Troupers) which were AC arc. My sister still has 6 of them sitting in her basement. Fired one up about a year ago and still ran fine!

Very cool. I’ve never seen a GE low pressure sodium lamp.

Please never stop making videos

Thanks for keeping this knowledge alive!

Can’t get enough of these Videos! Always enjoy seeing everyone of them ,

A beautiful and important part of Lighting History- I could easily stair at this amazing Light for hours! Roger

Freaking BEAUTY! I don’t have an NA-9, but do have many other cool lamps including some of the very first fluorescent lamps put on the market with “thermal auxiliary” and a “magnetic auxiliary” ballasts, and a very early glow-switch auxiliary ballast from Westinghouse made in very early 1939! It uses the insanely rare “GB-1” first ever made glow bulb starter in a double contact candelabra bayonet socket on the ballast! Thing of beauty and has neon gas in it. As for asbestos, I don’t even worry about it. We did asbestos abatement as part of our building demolition company in the early 1990’s, and I had a PAPR mask, we had a negative air machine, etc, and it was a freaking joke! Absolute government beauracracy at its very worst, and a joke!! I have several old lighting items with it in them and also PCB oil filled Pyranol capacitors, and will leave them as is. My experience actually going to school to get a certificate to “legally” “abate” asbestos and doing it taught me that it is bullshit and a money grab. Lol 😆 Cheers and beautiful lamp and ballast!! I have an actual bench test ballast for AH-1 and any H33, H25, or H1 400 watt medium and high pressure mercury lamps that came from a GE lab that also has the voltage taps like this one. It is a beauty! Cheers and Happy New Year!

Because you took stuff out of the dumpster? Thats not much of a reason. Of they didt want you to take something, then it shouldnt have been thrown away at all!!! I'm sorry to hear about the trouble.

Thank you for sharing. I've always had a fascination with lights.

I would imagine on the proper 123-133hz frequency, these lamps would be slightly brighter due to being able to handle more power at that frequency. If I ever get one of these, I might try using a VFD to drive one of these.

There is a possibly new old stock M-2 fixture on ebay

Awesome to see it running on the original ballast!

Thank You! Those must be quite rare, i newer seen a working sodium lamp of this kind from this era surviving that long complete with all the other components.

Thanks for posting this fascinating and informative video Adams Lighting LLC. Your videos are always great and there's no need for editing in my opinion. Great narration too. I'm always excited when a video from you pops up in my notifications.

Ooh! 20 minutes of vintage lighting entertainment, what a treat!

Do you have any Westinghouse enclosed arc lamps? Would be interested in seeing them. Thanks for the thorough videos.

Cool.

First time I see this. Pretty cool.

Why is there an inner globe?

I have the same one it worked the bulbs finally went out it’s like a 1938

Really enjoy the videos. Any idea how many foot candles this lamp was putting out at the base of the pole?

is that blue color daylight?

are cooper hewitt mercury lamp consider fluorescent?

Thats a very interesting lamp! a piece of history, im glad its in the safe hands of a collector now!

I've seen alot of these on TH-cam what is the runtime of the carbon

I had no idea the world of old light collecting was so cutthroat.

Any one know what the running or operating time would be on a set of rods , would they have used them sparingly so to get a number of uses or would they be turned on and the rods used up in one use

Brilliant, obscure fluorescent tech from uncle Sam! Thank you for sharing all this lighting marvels. Please keep up the good work. Cheers from 🇵🇹 🇪🇺

Thank you so much for showing us. Very interesting.

I've actually been looking for one of those rf fittings, funny enough. I'm a fluorescent light collector, also to add the two lamp rf fixtures these days are even harder to find than the single lamp variant from what I have noticed. As for the hostility from the other collector, that's fucked up. But yeah, you and nicksfans are the only two collectors I know of that have these fixtures, and both of you seem wonderful. Closest thing I have to those fittings are the fluorescent lighting manuals that Charles amick wrote, both of which do have the electrical schematic for both rf lamp fittings. Also thank you for showing us the inside as well, from one collector to another. I love this kind of stuff! You also got me excited seeing the black ender there, I didn't even know those were made. But of course seeing it be westinghouse I anticipate it, what's more those electrodes look very well built. I love seeing quality made lamps

In the day they probably had a way to step down 3-phase AC power while multiplying the frequency to get 188 herz

In the early 1900's they used these arc lamps to light up the Tabernacle on Temple square in SLC, Utah, I saw a picture of one in one of our church manual's

need a real camera not a phone.

Thank You. I've been involved with electricity, radio, and electronics for 70 years and I didn't know anything about these lamps. I thought they were only a creature of edison's DC dementia. Of course I have always been interested in big search lights.. but these AC streetlights are new territory.

Imagine this on Austin moon tower

Great video, thanks.

So glad You’re back ! Thank You so much for posting, Keep the videos coming!

That’s a super neat find. I didn’t even know those existed and I’m a pretty big lighting nerd.

Mmmm asbestos

Two words explain such extremely antisocial behavior: Weaponized. Autism. 💀

It nice have u back on You tube again. I beleve in Karma it will bite back

Very nice fixture! However, I would be very careful in operating the light. Those 2 caps will have pcb's inside, and due to age, they will fail! I used to have several 4' preheat fixtures with the high power factor ballasts, but the caps in them went bad. Do miss the blinkfest.......

Wow I had no idea those existed

truly unusual ! I remember seeing a florescent fixture as a teen back in the 70's that was an older style by that time. instead of the two prongs on both ends of the tube, it had a single connector at each end that were round, and reminded me of the end of a bullet. I think they were spring loaded, if I remember correctly... I had never seen one like that b4. and this is even more unusual & interesting. Thanks man! 👍gave you a like and sub 😀

Does this thing look like the cyan colored fluorescent lights in movies when on?

Don't these have a beryllium based phosphor?

Very interesting. I had no idea that these existed. During WWII I (age 6-7) lived with my grandparents and they had fluorescent lights in the kitchen that flickered badly. The ferro resonant ballast mostly fixed that. Later we got electronic ballasts all with no or little flicker. Now we have LED lights, some of which flicker.

Take super extra care when handling that broken lamp. Being manufactured in the early '40s it absolutely contains manganese doped zinc beryllium silicate phosphor before the phase-out in '49, which happened, incidentally, as a direct result of the identification and discovery of berylliosis of the lungs in workers making exactly this kind of lamp....quite possibly at the exact same factory where these very lamps were made. Be and its compounds, to those who are genetically susceptible, can be supremely toxic, with permissible air concentration levels at the mere nanogram per m^3 level. Hazardous air concentration limits which are only rivaled by things like radium, plutonium, and VX agent. I would actually love to get a spectrum of the light coming off of one of them. I have never seen the spectrum for an original Be phosphor based lamp and it would be a great addition to the halophosphate and tri-phosphate spectra on the wiki page, which I took many years ago.

I just ran the video at 2 X speed to get a representation of the 120 HZ, it should be running at. It's a lot more quiet!