Low Pressure Sodium....

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emahler

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Who's familiar with it? outside of long life, what are the advantages?

how would it compare to High Pressure Sodium?

we have a restaurant on the water, behind the restaurant is a marina. At one point in time there were 2 LPS fixtures on the roof of the restaurant shining over the marina. Roof is approx 20' above the water. The bulkhead is almost directly under the rear wall and the furthest slip is approx 250' from the bulkhead.

at some point in time, someone replaced one of the LPS fixtures with a 250W Metal Halide flood...but they used the remote mounted LPS ballast to power it:D

The existing LPS is a "SOX90" or 90W sodium oxide lamp.

Would it be advantageous to rebuild the existing LPS fixture and replace the one that went missing? or swap them over to 400W HPS?

The lighting is primarily for security. Thanks
 
does the customer want "yellow" light?? i like the metal halide in a marina area because the usable light carries a longer distance!!! the upgrade with new fixtures is the only way to go!! better for you and the customer......
 
The CRI of LPS is 0. A big fat goose egg. For that reason alone it's a bad choice. Ballasts and lamps are hard to find as well.

I would go with the HPS myself as every marina around here seems to have a few big 400 or 1000 watt floodlights over the docks.

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Just stand in the light of a LPS fixture and look at the sickly gray colored face of the person next to you.

Get rid of them
 
I am not a very strong fan with the LPS [ low pressure soduim ] luminiares for one obvous reason is cost of bulb and hard to find luminaires [ this is true in North America area but European it used to be very popuar on roadways but now they are changing to PSMH or HPS ]

second thing is the colour retation is squat really muted alot of colours pretty serious.

90 w LPS have simuair performace as 310 HPS is but HPS have better colour reation than LPS is.

and also the LPS is pretty long starting it will take up to 5-15 min to get full brightness.
the only bad thing i hate about it is how you disposil the lamps properly they are [ beep ] to do it propely.

But let me forwarn a little senice the OP mention marina you have to have extra condseration is glare this part i am not kidding about glare so kinda keep in mind with it.

hope this will help you with the info

Merci, Marc
 
I have extensive knowlage of theses lps lamps and ballast due to the fact that I worked for Palm Beach County Parks. Alot of the parks on the beach had to have these fixtures for the turtles. IMO They have the same life spand as any HID fixture the only advantage is they deliver more lumens of light for each watt of power. So good for say parking lots where you dont really care about kelvins but not so much for anywhere else
 
frenchelectrican said:
the only bad thing i hate about it is how you disposil the lamps properly they are [ beep ] to do it properly



Merci, Marc
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Its fun break the lamp and throw it in water you will get a real kick out of it:wink: :wink:
 
eheins said:
I have extensive knowlage of theses lps lamps and ballast due to the fact that I worked for Palm Beach County Parks. Alot of the parks on the beach had to have these fixtures for the turtles. IMO They have the same life spand as any HID fixture the only advantage is they deliver more lumens of light for each watt of power. So good for say parking lots where you dont really care about kelvins but not so much for anywhere else
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yeah, sea turtles are not a worry here...glare is...thinking about going to 2 - 400W HPS fixtures...much easier to maintain...

kind of interested in the power savings though with the LPS...
 
I think the demand for the energy savings of LPS lamps quickly fades when the client sees the very jaundiced color it makes everything. It's a real sickly color, that is for sure. I have yet to run across a fan of the color. For me, I'd pay a few operating shekels more to have a normal color temperature.

(Do supply houses even stock LPS lamps and ballasts, normally?)
 
mdshunk said:
I think the demand for the energy savings of LPS lamps quickly fades when the client sees the very jaundiced color it makes everything. It's a real sickly color, that is for sure. I have yet to run across a fan of the color. For me, I'd pay a few operating shekels more to have a normal color temperature.

(Do supply houses even stock LPS lamps and ballasts, normally?)
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not sure, this all came about on Saturday...supply houses all closed till tomorrow...but Grainger carries the lamps, but not the ballasts
 
mdshunk said:
I think the demand for the energy savings of LPS lamps quickly fades when the client sees the very jaundiced color it makes everything. It's a real sickly color, that is for sure. I have yet to run across a fan of the color. For me, I'd pay a few operating shekels more to have a normal color temperature.

(Do supply houses even stock LPS lamps and ballasts, normally?)
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I agree the light is like out of a bad horror flik or something. And none that I know of in S FL we would order them buy the case from G.E so we allways had them in stock
 
I havent seen an lps fixture installed in 20 yrs

I havent seen an lps fixture installed in 20 yrs

Even hps is fallen by the wayside in the last 10 yrs. I truly believe the best bang for the buck is metal halide.
 
quogueelectric said:
Even hps is fallen by the wayside in the last 10 yrs. I truly believe the best bang for the buck is metal halide.
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True. A metal halide refit is an easy upsell for fixtures with failed HPS ballasts. Nice, bright, white light. Convert one fixture, and you often get calls back to convert one or several more in the same area.
 
my concern with the MH is the glare...I don't have pictures, but the back of the restaurant is a wall of glass that overlooks the marina...the property is about 50' wide, the restaurant is 48' wide...there is a condo complex about 40' off the right of the restaurant and houses about 25' to the left of the restaurant.

the lights are about 6' above the glass windows....

I prefer the MH, but I'm concerned with the light pollution and glare...

am I worrying about nothing?
 
mdshunk said:
True. A metal halide refit is an easy upsell for fixtures with failed HPS ballasts. Nice, bright, white light. Convert one fixture, and you often get calls back to convert one or several more in the same area.
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we've been using the MH retro lamps (run off an HPS ballast) in parking lots lately to convert them without the cost of replacing the ballast at this time...
 
emahler said:
my concern with the MH is the glare...I don't have pictures, but the back of the restaurant is a wall of glass that overlooks the marina...the property is about 50' wide, the restaurant is 48' wide...there is a condo complex about 40' off the right of the restaurant and houses about 25' to the left of the restaurant.

the lights are about 6' above the glass windows....

I prefer the MH, but I'm concerned with the light pollution and glare...

am I worrying about nothing?
Click to expand...

It's probably not the fact that it's MH, it's due to light trespass. The architect or engineer, or whoever spec'ed those lights, didn't understand what they were truly getting.
 
emahler said:
my concern with the MH is the glare...I don't have pictures, but the back of the restaurant is a wall of glass that overlooks the marina...the property is about 50' wide, the restaurant is 48' wide...there is a condo complex about 40' off the right of the restaurant and houses about 25' to the left of the restaurant.

the lights are about 6' above the glass windows....

I prefer the MH, but I'm concerned with the light pollution and glare...

am I worrying about nothing?
Click to expand...

IMO one good option is get the a cutoff luminaire which that mean it will not shine any light above the luminaire itself something like this

AerisWallMainGraphic.jpg



there are quite few manufacters do come out with cutoff lens i know it may cost little more or none over standard wallpacks.

i will add a link for more details here http://www.lithonia.com/NightTimeFriendly/Cutoff.asp

this will expain little more clearer on this one

Merci, Marc
 
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wall mount like that won't work...remember, i need to throw the light out about 250' from the fixture...or as far as a floodlight will go anyway...
 
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