Low Pressure Sodium Lamps Disadvantages

Sodium lamps were first produced commercially by philips in holland in 1932.

Low pressure sodium lamps disadvantages.

Two varieties of such lamps exist. Types of lighting. The efficacy of low wattage white hps lamps is lower than that of metal halide lamps lumens per watt of low wattage metal halide is 75 85 while white hps is 50 60 lpw. Designing with lps see also lps costs low pressure sodium like all lighting types has its own pecularities advantages and disadvantages some of these are discussed in these links.

Philips 234047 18 watt t15 sox e18 low pressure sodium hid light bulb. Low pressure lps and high pressure hps these lamps are mostly used for street lighting as well as industrial uses. 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.

4 2 out of 5 stars 20. 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. 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.