Can HPS glow more red/orange at EOL? « on: December 18, 2019, 10:51:38 PM » Author: Cole D.
I've noticed some HPS glow redder oranger, but typically most HPS lamps I see at EOL glow only bright green or cycle from normal orange to lime green color. I guessing certain brands of HPS lamps might contain more of the sodium so glow a deeper color, than others.
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Collect vintage incandescent and fluorescent fixtures. Also like HID lighting and streetlights.

	Re: Can HPS glow more red/orange at EOL? « Reply #1 on: December 19, 2019, 01:38:16 AM » Author: dor123
Most HPS lamps I've seen here in Kiryat Ata and Haifa, glowing reddish or pinkish at EOL. The redder color is caused by higher mercury pressure in the lamp, as its age, so push the sodium emission more to the red. Unsaturated (Non-cycling) HPS lamps, retains their original color until they becomes sodium starved, than changes to bluish. HPS can also glow dim orange if they are leaked, or have their outerbulb lost vacuum.
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	Re: Can HPS glow more red/orange at EOL? « Reply #3 on: December 19, 2019, 10:53:58 PM » Author: dor123
@Ash: The older lamps also tended to have redder colors.
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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.

	Re: Can HPS glow more red/orange at EOL? « Reply #4 on: December 19, 2019, 10:57:10 PM » Author: Cole D.
I see. I think I heard also, the GE Lucalox HPS have a redder color, but I could be wrong on that.
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Collect vintage incandescent and fluorescent fixtures. Also like HID lighting and streetlights.