 Last comments
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Spectral lines Multi-vaporTuopeek07/12/25 at 05:54Max: I believe you. I use a combination of 100 W mercur...
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Spectral lines Multi-vaporTuopeek06/12/25 at 11:10Tuopeek: Only on occasion. It's a cheerful warming lig...
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1961 Philips SOI 60WMax06/12/25 at 05:24Max: It's always good to take old lamps out of the...
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Spectral lines Multi-vaporTuopeek06/12/25 at 05:16Max: That's a fortunate accident indeed. Are you a...
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Sylvania BA 575/2 DE BriteArc LampRia06/12/25 at 05:12Max: You should give it a shot still, it's always ...
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1993 Philips C1500/ED37Max06/12/25 at 05:03Max: Many different lamps were built and tested at Phil...
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Mid-1960s Philips Spectraal RbIIMax06/12/25 at 04:59Max: I agree, the rubidium discharge lamp is an interes...
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1961 Philips SOI 60WMax05/12/25 at 20:42Ria: Wonderful old lamp, don't have many SOI ones,...
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Spectral lines Multi-vaporTuopeek05/12/25 at 16:29Tuopeek: Thanks Max, perhaps a fortunate accident, as it ha...
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SON under SOXTuopeek05/12/25 at 10:28Tuopeek: I bought an Iwasaki NHT150SDX some time as it also...
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1961 Philips SOI 60WMax05/12/25 at 10:18Tuopeek: Very clean example of the SOI lamp, as usual Max. ...
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Sylvania BA 575/2 DE BriteArc LampRia05/12/25 at 00:05Ria: Thanks, I think it'll stay a display lamp, th...
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Self-ballasted S450BT37 during operationMax04/12/25 at 22:47Max: That S450BT37 certainly has a very nice design and...
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Spectral lines Multi-vaporTuopeek04/12/25 at 22:41Max: Nice shot, and the spectrum insert is a very nice ...
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Black light comparisonTuopeek04/12/25 at 22:35Max: Thank you for posting such a nice comparison. The ...
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SON under SOXTuopeek04/12/25 at 22:30Max: Nice experiment! The sodium vapor in HPS lamps has...
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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...
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Sylvania BA 575/2 DE BriteArc LampRia04/12/25 at 17:17Tuopeek: Looks similar to the Sharxs HTI lamp I have, which...
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Sylvania BA 575/2 DE BriteArc LampRia03/12/25 at 13:09Sammi: Yes, it would be nice to see it litted 
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Mid-1960s Philips Spectraal RbIIMax28/11/25 at 16:44Ria: The rubidium lamp is our favourite, it's a be...
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Mid-1960s Philips Spectraal RbIIMax28/11/25 at 14:13Tuopeek: The rubidium discharge is quite fascinating and ha...
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SON under SOXTuopeek23/11/25 at 18:34Tuopeek: Thanks, Yes, I have often played with low pressure...
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SON under SOXTuopeek23/11/25 at 15:05Ria: Interesting. Seen SOX under SOX before, but never ...
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Black light comparisonTuopeek20/11/25 at 21:46Tuopeek: Thanks, Eye seemed to have the market in these ori...
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1993 Philips C1500/ED37Max19/11/25 at 02:40347vPowerlite: Interesting! I didn't know Philips experiment...
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Black light comparisonTuopeek19/11/25 at 02:35347vPowerlite: Interesting comparison! I have a generic 400w MV b...
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Spectral lines Multi-vaporTuopeek18/11/25 at 18:50Ria: Been there, done that 
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Spectral lines Multi-vaporTuopeek18/11/25 at 17:03Tuopeek: Thanks Ria, I certainly had to suffer temporary bl...
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Black light comparisonTuopeek18/11/25 at 17:02Tuopeek: It's definitely a weird lamp. The mercury bit...
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Black light comparisonTuopeek17/11/25 at 20:01Sammi: You can certainly tell the difference in quality ...
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