Low Pressure Sodium Lamp
Camila Farah
In defense of lps m s.
Lamptech museum of electric lamp technology sox low pressure sodium. Low pressure sodium lamps producing up to 180 lumens per watt have the highest efficacy of all commercially available lighting sources. When heated up the. Low pressure sodium lamps are notorious for having the worst cri values on the market.
4 3 out of 5 stars 21. Low pressure sodium lamps are one of the most efficacious light sources. Basically an lpsv lamp is a gas discharge lamp that uses sodium in an excited state to produce light. Typically they fall around 25 on a scale of 100 where 100 is the best possible.
The discharge tube may be linear sli lamp 2 or u shaped. The first lamp was a round bulb with two electrodes on each side. Other options new from 36 95. Two varieties of such lamps exist.
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Low pressure sodium lamps operate much like a fluorescent lamp and require a ballast. Low pressure sodium lps lamps have a borosilicate glass gas discharge tube arc tube containing solid sodium a small amount of neon and argon gas in a penning mixture to start the gas discharge. Even though they emit a yellow light a low pressure sodium lamp should not be confused with a standard high pressure sodium lamp which is a high intensity discharge lamp. The solid sodium metal remained on the bottom center of the bulb.
Bullough lighting design and application september 2004. A low pressure sodium lamp is shown in the image below. Philips 234047 18 watt t15 sox e18 low pressure sodium hid light bulb. Led wall pack with photocell 100w wall pack led light 13000lm 5000k daylight ip65 dusk to down led outdoor lighting.
Low pressure sodium lighting is a monochromatic source and is often rejected for its deficiency in supporting color. Low pressure and high pressure low pressure sodium lamps are highly efficient electrical light sources but their yellow light restricts applications to outdoor lighting such as street lamps where they are widely used.
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