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.
Why do we use sodium light?
Sodium-vapour lamps are good for night-time illumination because of their high efficiency and because the light they produce penetrates mist and fog particularly well. As the bulb warms up, the sodium vapour becomes excited, emitting a characteristic yellow light of wavelength 589 nm.
Are sodium lights still used?
High pressure sodium bulbs ("lamps") are an old standby for lighting that's still used today in spite of so much talk of LED lights. While upgrading to LED provides a lot of benefits, high pressure sodium (HPS) lamps still provide some of the most efficient lighting available.
What is a sodium light?
Definition of sodium light : the yellow light of glowing sodium vaporsodium vaporHigh-pressure sodium lamps are quite efficient — about 100 lumens per watt, when measured for photopic lighting conditions. Some higher-power lamps (e.g. 600 watt) have efficacies of about 150 lumens per watt.https://en.wikipedia.org › wiki › Sodium-vapor_lampSodium-vapor lamp - Wikipedia consisting chiefly of two monochromatic portions of wavelength 5890 and 5896 angstroms corresponding respectively to the D2 and D1 Fraunhofer lines.
How efficient are sodium lights?
High-pressure sodium lamps are quite efficient — about 100 lumens per watt, when measured for photopic lighting conditions. Some higher-power lamps (e.g. 600 watt) have efficacies of about 150 lumens per watt.
How much electricity does a sodium light use?
A high-pressure sodium street light can draw up to 1000 watts, and an incandescent light used in the 1900s needed 320 watts. Some LED street lights require only 73 watts and, according to the U. S. Department of Energy, produce a higher quality of light.
Are sodium lights better than LED?
LED Advantages The biggest differences between LED and High-Pressure Sodium lights are color temperature and CRI. LED lights have a wider variety of color temperatures along with higher CRIs. LED Area Lights have a much easier immanence than High Pressure Sodium lights.Mar 6, 2018
What is the most energy-efficient light?
LED bulbs. Generally, the most energy efficient lighting technology you can buy for your home is the Light Emitting Diode (LED). A quality LED produces the most light with the least electricity.
Are high pressure sodium lights being phased out?
Phasing out A number of popular lighting types will have to be phased out by 2017 including selected 'standard' high-pressure sodium (including retrofit), high-pressure mercury, and standard performance metal halide.
Can you replace sodium bulb with LED?
LED corn cob lights are one of the most efficient ways to replace metal halide, mercury vapor, and high-pressure sodium HID bulbs.
Does sodium emit yellow light?
The yellow color is a product of the light emitted by the sodium electrons. Although the sodium light requires less energy that other types of light and is more efficient, there are drawbacks to the use of these light sources. Metallic sodium reacts with the moisture in the air and can explode if the bulb is broken.Jan 2, 2014
What color is sodium light?
yellow
Why does a sodium street light look yellow instead of white?
As current flows through the electrode, the metal is heated. In the vapor state, the sodium electrons are excited to higher energy levels When these electrons return to a lower energy level, light is given off. The yellow color is a product of the light emitted by the sodium electrons.Jan 2, 2014