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Black light comparisonTuopeek04/12/25 at 22:35Max: Thank you for posting such a nice comparison. The ...

SON under SOXTuopeek04/12/25 at 22:30Max: Nice experiment! The sodium vapor in HPS lamps has...

Sylvania BA 575/2 DE BriteArc LampRia04/12/25 at 22:20Max: With an arc gap of 7 mm, it is more akin to HMIs w...

Sylvania BA 575/2 DE BriteArc LampRia04/12/25 at 17:17Tuopeek: Looks similar to the Sharxs HTI lamp I have, which...

Sylvania BA 575/2 DE BriteArc LampRia03/12/25 at 13:09Sammi: Yes, it would be nice to see it litted Cool

Mid-1960s Philips Spectraal RbIIMax28/11/25 at 16:44Ria: The rubidium lamp is our favourite, it's a be...

Mid-1960s Philips Spectraal RbIIMax28/11/25 at 14:13Tuopeek: The rubidium discharge is quite fascinating and ha...

SON under SOXTuopeek23/11/25 at 18:34Tuopeek: Thanks, Yes, I have often played with low pressure...

SON under SOXTuopeek23/11/25 at 15:05Ria: Interesting. Seen SOX under SOX before, but never ...

Black light comparisonTuopeek20/11/25 at 21:46Tuopeek: Thanks, Eye seemed to have the market in these ori...

1993 Philips C1500/ED37Max19/11/25 at 02:40347vPowerlite: Interesting! I didn't know Philips experiment...

Black light comparisonTuopeek19/11/25 at 02:35347vPowerlite: Interesting comparison! I have a generic 400w MV b...

Spectral lines Multi-vaporTuopeek18/11/25 at 18:50Ria: Been there, done that Mr. Green

Spectral lines Multi-vaporTuopeek18/11/25 at 17:03Tuopeek: Thanks Ria, I certainly had to suffer temporary bl...

Black light comparisonTuopeek18/11/25 at 17:02Tuopeek: It's definitely a weird lamp. The mercury bit...

Black light comparisonTuopeek17/11/25 at 20:01Sammi: You can certainly tell the difference in quality ...

Spectral lines Multi-vaporTuopeek17/11/25 at 19:57Ria: Oh wow, this is amazing Bulb Man

Self-ballasted S450BT37 during operationMax17/11/25 at 18:24AgentHalogen_87: That's a brilliant design having two filament...

Multi Vapor Halide Tuopeek17/11/25 at 15:44Tuopeek: It was an eBay buy but I think from an electrical ...

Multi Vapor Halide Tuopeek17/11/25 at 04:41Max: Did you buy it, or was it given to you? What you h...

Self-ballasted S450BT37 during operationMax17/11/25 at 04:35Max: Thank you, you two!

Tuopeek - Dealing with thos...

One good, one badTuopeek17/11/25 at 04:28Max: Interesting! Can you please post lit pictures of t...

One good, one badTuopeek16/11/25 at 23:57Sammi: That's what I was thunking, if the enveplop i...

One good, one badTuopeek16/11/25 at 21:15Tuopeek: Thanks Sammi, I now have to go and weigh these lam...

One good, one badTuopeek16/11/25 at 20:35Sammi: IIRC, proper Woods glass weighs a good deal more. ...

One good, one badTuopeek16/11/25 at 20:27Tuopeek: Just looks dark like 'Woods' but definit...

One good, one badTuopeek16/11/25 at 19:41Ria: Hmmm, so what is the fake lamp made of then..? Not...

Self-ballasted S450BT37 during operationMax16/11/25 at 17:29Ria: Great picture as always. Max Mercury Vapour Lamp

Multi Vapor Halide Tuopeek16/11/25 at 11:42Tuopeek: Interesting, the lamp is essentially new, although...

Self-ballasted S450BT37 during operationMax16/11/25 at 11:37Tuopeek: Great sharp crisp image there. I find it quite har...

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