What are the advantages of sodium Vapour lamp?
WHAT ARE THE ADVANTAGES OF SODIUM VAPOUR LAMPS OVER OTHER LAMPS? Efficiency: Sodium Vapour Lamps are very efficient, turning one watt of power into a whopping 200 lumens! Compare this with the 12 lumens per watt of an incandescent bulb, or the 60 lumens per watt of a CFL, or the 90 lumens per watt of FTL.
What is the use of sodium Vapour lamp?
sodium-vapour lamp, electric discharge lamp using ionized sodium, used for street lighting and other illumination. A low-pressure sodium-vapour (LPS) lamp contains an inner discharge tube made of borosilicate glass that is fitted with metal electrodes and filled with neon and argon gas and a little metallic sodium.
Where are sodium Vapour lamps commonly used?
High-pressure sodium (HPS) lamps have been widely used in industrial lighting, especially in large manufacturing facilities, and are commonly used as plant grow lights. They contain mercury. They have also been widely used for outdoor area lighting, such as on roadways, parking lots, and security areas.
What is the efficiency of sodium Vapour lamp?
up to 190 lumens per watt
Sodium vapor lamps are some of the most efficient lamps in the world. They have an efficiency of up to 190 lumens per watt compared to an incandescent street lamp which has between 15 and 19 lumens per watt.
What is the difference between sodium and mercury Vapour lamps?
The basic difference between the two is, the former works by electric discharge (passage of electricity through sodium vapours at high/low pressure) while the latter works through the combined effect of electric discharge through mercury vapours and fluorescence from phosphors (luminescent materials).
Why do we use sodium lamp in spectrometer?
Using a spectrometer to observe the absorption lines formed when white light passes through sodium vapour. It is essential to provide an intense sodium flame. Place the flame midway between the two lenses where the first lens will produce a sharp image.
What is advantage of LED lamp?
This directional lighting capability reduces wasted light and energy. Unlike incandescent lighting, LEDs don’t “burn out” or fail, they merely dim over time. Quality LEDs have an expected lifespan of 30,000–50,000 hours or even longer, depending on the quality of the lamp or fixture.
What are the advantages and disadvantages of LED lamps?
Comparison Table for Advantages And Disadvantages Of LED
|Advantages of LED||Disadvantages of LED|
|LEDs are more reliable||Little effective in wide-area|
|LEDs are more efficient to use under cold temperature||LEDs causes backward heat dissipation|
Are sodium vapor lights energy efficient?
Sodium vapor bulbs contain metals that are evaporated into inert gas within the glass casing while LEDs are a solid state technology. Both technologies are very efficient. The difference is that sodium vapor lights were the most efficient technology of the 1970s while LEDs are the modern day equivalent.
What is the wavelength of sodium lamp?
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.