Definition of sodium light : the yellow light of glowing sodium vapor consisting chiefly of two monochromatic portions of wavelength 5890 and 5896 angstroms corresponding respectively to the D2 and D1 Fraunhofer lines.
Why do we use sodium light?
These lamps are mostly used for street lighting as well as industrial uses. The lamp works by creating an electric arc through vaporized sodium metal. Other materials and gases are used to help start the lamp or control its color.
What color light is sodium?
yellow
Correlated Color Temperature (Read more Here)
Low and High Pressure Sodium lights are well-known for their warm yellow glow (CCT values around 2200K). Although High Pressure Sodium lamps emit visible light across a slightly more broad spectrum than Low Pressure Sodium lamps, they are still very limited.
How much do sodium lights cost to run?
Grow Light Operating Cost
| 1000 watt Sodium | 600 watt Sodium | |
|---|---|---|
| Ballast Wattage | 1100 | 665 |
| Cost per Month | $52.80 | $31.92 |
| Initial Lumens | 130000 | 89000 |
| Mean Lumens | 126000 | 81000 |
Why are sodium lamps used as street lights?
The vapourized sodium ionizes and shines a nearly monochrome yellow. LPS lamps have been used widely for street lighting since the 1930s because of their efficiency (measured in lumens per watt) and the ability of their yellow light to penetrate fog.
Can I put an LED bulb in a sodium fixture?
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.LEDs, however, are better able to control their light, which is why a lower-watt LED can replace a higher-watt high pressure sodium bulb.
What Colour of light sodium lamp produces?
When the lamp is first started, it emits a dim red/pink light to warm the sodium metal; within a few minutes as the sodium metal vaporizes, the emission becomes the common bright yellow.
Why are sodium street lights yellow?
Most street lights are, however, HPS. LPS lights contain argon and neon gas, which light up when a current is passed through them. These gasses increase in temperature, which then vaporizes the sodium, creating the yellow-orange light that you see.
What are HPS grow lights?
High pressure sodium (HPS) grow lights are one half of a standard HID (high intensity discharge) grow system. Producing a red spectrum light, HPS grow lights are used to replace MH (metal halide) bulbs once your plants have entered the flowering stage.
Why is sodium light yellow?
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.Metallic sodium reacts with the moisture in the air and can explode if the bulb is broken.
Do high pressure sodium lights use a lot of electricity?
High pressure sodium fixtures are not as energy efficiency as LEDs. In fact, LED bulbs use between 40-75% less electricity than a HPS fixture.
What is the average life of sodium Vapour lamp?
The efficiency of a sodium vapour lamp under practical conditions is about 40-50 lumens/watt. Such lamps are manufactured in 45, 60, 85 and 140 W ratings. The average life is about 3000 hours and is not affected by voltage variations.
Why is HPS better than LED?
The heat per watt is far greater with an HPS fixture compared to LED. This technology is far more efficient in transferring energy in to light, as it produces less heat and has a higher wattage equivalency to HPS (600w vs 1000w).
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.
Do high pressure sodium lamps explode?
Metal halide (MH) lamps can explode (typically referred to as sudden nonpassive failure) because they operate at high pressures, but some products are manufactured with safety features to prevent injury.Some MH lamps are self-extinguishing-they will automatically extinguish if the outer envelope is broken.
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.
Do high pressure sodium bulbs need a ballast?
HPS lamps require ballasts to regulate the arc current flow and deliver the proper voltage to the arc.Instead, an electronic starting circuit within the ballast generates a high-voltage pulse to the operating electrodes.
How do I dispose of high pressure sodium bulbs?
Recycling and Disposal Guide. High-intensity discharge bulbs contain hazardous mercury and must be recycled at a free drop-off mercury lamp recycling site.
How many lumens is a 70 watt high pressure sodium bulb?
70-watt HPS bulbs provide between 6300 and 7000 lumens of light in frosted and clear options.
What causes a high pressure sodium light to go on and off?
A high pressure sodium lamp cycling on and off usually indicates the lamp has reached the end of its normal life.
What is the difference between mercury lamp and sodium lamp?
The mechanism in mercury vapour lamp is more involved and sequential.Hence, the light from the mercury vapour lamp is white. Applications. Although sodium vapour lamps produce much higher light output (about 90 lumens/watt) they cannot be used in lighting applications where colour-rendering property is very crucial.
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