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LPS Storefront lights

LPS Storefront lights


55w SOX lights under canopy in a shopping center.

CIMG3647.JPG CIMG3605.JPG CIMG0858.JPG CIMG3438.JPG

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Filename:CIMG0858.JPG
Album name:rlshieldjr / Misc Lighting and Non-lighting
Keywords:Lanterns
File Size:17 KB
Date added:Jan 21, 2011
Dimensions:286 x 480 pixels
Displayed:278 times
Date Time:2009:03:08 04:42:43
DateTime Original:2009:03:08 04:42:43
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Exposure Time:1/60 sec
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Flash:Flash, Auto-Mode
Focal length:7.6 mm
ISO:200
Make:CASIO COMPUTER CO.,LTD.
Model:EX-Z9
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icefoglights
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ITT Low Pressure Sodium NEMA


GoL
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Jan 21, 2011 at 11:15 PM Author: icefoglights
Interesting setup. The color is terrible, but they won't attract many bugs

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Medved
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Jan 22, 2011 at 12:56 AM Author: Medved
55W placed so low? I think 35W would be far enough here...

No more selfballasted c***

dor123
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Jan 22, 2011 at 03:15 AM Author: dor123
LPS aren't suitable for indoor lighting since no CRI is possible (CRI=0). So you could see only black and orange.
One lamp seems to be redder then the other. Why?

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 European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

kai
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Jan 27, 2011 at 11:47 AM Author: kai
Could it be that the idea is to provide an intermediate between indoors and bright daylight outdoors? Judging from the exposure levels it appear to be around 400 lux. Actually still not that much for such a purpose.
gailgrove
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MVs at Dusk


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Jan 27, 2011 at 03:27 PM Author: gailgrove
I like LPS but that horrible idea.

Say no to Induction & LED, HID forever!

Kev
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Jan 27, 2011 at 03:37 PM Author: Kev
@Dor123 lamp is about to fail! I like this idea. They are efficent!

Voted to leave the EU and proud! 👉🏻🇪🇺🇬🇧

gailgrove
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Jan 27, 2011 at 03:40 PM Author: gailgrove
But the colour rendering is horrible which is usually bad for a store's business.

Say no to Induction & LED, HID forever!

icefoglights
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ITT Low Pressure Sodium NEMA


GoL
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Jan 27, 2011 at 05:49 PM Author: icefoglights
It could just be after hours security lighting, in which case CRI isn't much of an issue, and efficiency would be important. Besides, these aren't going to attract many bugs overnight like white sources would, which would mean less dead bugs to clean up before opening.

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dor123
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Jan 28, 2011 at 12:30 AM Author: dor123
@kevxsi16v: LPS lamps don't shift their color during life as HPS lamps do because their spectrua is simple and contains only the two orange lines.
Signs of LPS about to fail is similar to the fluorescent lamps, when they flashing during the ignition tries, they glow their neon red color.
However the neon red color is much dimmer then the sodium orange color at full brightness, and this slightly red LPS in this picture seems to glow only slightly dimmer then the others.
Perhaps it contains less sodium then the other?

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 European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

Lampwizard
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Jan 28, 2011 at 03:27 AM Author: Lampwizard
SOX do suffer from color shifting when sodium depletion occurs at end-of-lamplife, the red neon line becomes prevalent as well. CRI of LPS is indeed zero: but you won't be able to recognize the color orange either under this light. Actually, you won't see any color at all. I suspect that when a person gets locked up in a closed room with LPS lamps only for a longer period of time, the vison will eventually change to black/gray/white without any color recognition, not even orange.

These lamps might also be SOX-E36W which has the same dimensions as SOX55W.

Philips colour 27: best fluorescent tube colour.

dor123
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Jan 28, 2011 at 03:41 AM Author: dor123
I think this may be dangrous for this situation, when the vision change to B&W when you are under a LPS light for a long period of time.
B&W vision is a type of color blindness.

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 European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

Lampwizard
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Jan 28, 2011 at 05:37 AM Author: Lampwizard
I don't think it poses any danger. The cone cells in your eye only get exposed to the orange 589nm sodium spectral line while others perceive it as "dark". Upon returning to normal (day)light, your color vision will turn to normal. The only danger might be that the lack of color rendering takes away essential visual information needed to anticipate and recognize danger or special situations.

Philips colour 27: best fluorescent tube colour.

Kev
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Jan 28, 2011 at 12:32 PM Author: Kev
@Dor123 as all the street lighting in my area and many of the schools and shops i look after have sox fittings i know pretty well that SOX does go a reddy colour when lamp is reaching EOL!

Voted to leave the EU and proud! 👉🏻🇪🇺🇬🇧

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