Why tubular HPS more common on European lamps? « on: June 02, 2019, 10:50:47 AM » Author: Cole D.
I notice typically I've seen on here that with HPS lamps, the 400W and higher is generally the tubular shape, while the lower wattage is the elliptical. So I was looking on Google to see if tubular shape lamps of lower wattages exist. I saw some on here but most appear to be in European countries. I saw GE Lucalox and Osram. But not really in US. Why is that?
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Collect vintage incandescent and fluorescent fixtures. Also like HID lighting and streetlights.

	Re: Why tubular HPS more common on European lamps? « Reply #1 on: June 02, 2019, 11:53:53 AM » Author: dor123
Because tubular lamps are more compact than elliptical lamps, even more compact than reduced size elliptical lamps. Tubular HPS lamps are available from 70-1000W.
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	Re: Why tubular HPS more common on European lamps? « Reply #3 on: June 03, 2019, 12:46:04 AM » Author: Medved
Regarding the sensitivity to the outer shape, the MH are far different story than HPS. The main difference is the MH generate way more thermal load and that is the main factor in shorter life. The HPS run way cooler, so the tubular outer shape means not much life problems by its own. And the reason for their higher popularity in Europe is their compactness - it fits to smaller fixtures. The reason why the are not that common in the US could be related to the popularity of a CWA style ballast in 120V world, which can not offer that much thermal stabilization as the simple series choke could offer in the 230V environment. The tubular outer reflects quite some heat back at the arctube, leading to worse arc tube temperature so pressure control. As the CWA is inherently less thermally stable, it could be too bad for the tubular concept, so the benefit of the oval shapes became important.
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	Re: Why tubular HPS more common on European lamps? « Reply #5 on: November 16, 2019, 11:51:44 PM » Author: LightsDelight
Quote from: dor123 on June 02, 2019, 11:53:53 AM Because tubular lamps are more compact than elliptical lamps, even more compact than reduced size elliptical lamps. Tubular HPS lamps are available from 70-1000W. I've seen a tubular 50W HPS before
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	Re: Why tubular HPS more common on European lamps? « Reply #6 on: November 17, 2019, 09:45:36 AM » Author: Mandolin Girl
Quote from: tolivac on June 11, 2019, 03:10:46 AM I have some tubular style 600W HPS grow lamps.They are common with grow lights-600W.Allows for a smaller more compact fixture. Is there something you want to tell us.??
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	Re: Why tubular HPS more common on European lamps? « Reply #7 on: November 17, 2019, 10:10:08 AM » Author: Rommie
Quote from: LightsDelight on November 16, 2019, 11:51:44 PM I've seen a tubular 50W HPS before We have a few tubular 50W ones, here is a GE Lucalox XO lamp made in Hungary. These have the best colour of any of the HPS lamps in our opinion
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	Re: Why tubular HPS more common on European lamps? « Reply #8 on: November 17, 2019, 11:36:33 AM » Author: dor123
I forgot about the existence of the tubular 50W and even the tubular 35W HPS lamps. HPS lamps under 70W aren't exists in Israel.
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.