Two varieties of such lamps exist.
Low pressure sodium lamps disadvantages.
Fluorescent bulbs up types of lighting.
Sodium lamps were first produced commercially by philips in holland in 1932.
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Low pressure lps and high pressure hps these lamps are mostly used for street lighting as well as industrial uses.
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.
Low pressure sodium lamp is a kind of low pressure sodium vapor discharge tube inner tube with special anti sodium glass blown and can radiate 5890a 5896a sodium line can be used as a monochromatic light source optical polarimeter refractometer polarization instrument in.
A sodium vapor lamp is a gas discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm.
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Types of lighting.
There are two kinds of sodium lights.
Lps light provides essentially no color rendition so is inappropriate for any use where 1 color perception is important and 2 lps will be the only light source illuminating the area.