What is high pressure sodium lamp?
High-pressure sodium (HPS) lamps are part of the family of high intensity light bulbs that put out large amounts of light generally needed for street lighting and security lighting. The combination of metals and gasses within inside the glass tube produces an orange-white light commonly found in street lights.
How does a high pressure sodium lamp work?
In a high pressure sodium lamp, a compact arc tube contains a mixture of xenon, sodium and mercury. The mercury vapor raises the gas pressure and operating voltage, and the sodium vapor produces light when the pressure within the arc tube is sufficient.
Where are high pressure sodium lamps used?
High pressure sodium lamps are used in outdoor lighting of streets and parking lots and in indoor settings where color rendering is not critical. These indoor settings include warehouse and shipping areas and some manufacturing areas.
How can you tell if a High Pressure Sodium bulb is bad?
When the bulb produces no light, you know it is bad. The less sarcastic answer is to look at the small tube inside the bulb. If the tube has a dark or even a black color to it, that means it is dead and will not work.
Can you put a LED bulb in a High Pressure Sodium fixture?
While upgrading to LED provides a lot of benefits, high pressure sodium (HPS) lamps still provide some of the most efficient lighting available. 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.
How can you tell if a high pressure sodium bulb is bad?
Can you put an LED bulb in a high pressure sodium?
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 voltage is a high pressure sodium bulb?
High pressure sodium, most models 35 to 100 watts: Nominally 55 volts but varies with age and condition from 45 to 85 volts. High pressure sodium, most models 150, 200, 250, and 400 watts other than mercury retrofit: Nominally 100 volts but varies with age and condition from 80 to 170, sometimes 180 volts.
How long does a high pressure sodium bulb last?
High Pressure Sodium lights maintain their luminescence fairly well with 90% still available halfway through their lifespan (around 12,000 hours). HPS bulbs typically emit 80% of their original rated output at the end of life (around 24,000 hours).
How does the high pressure sodium lamps work?
High pressure sodium lamps are a type of gas-discharge lamp. This means they create light by sending electricity between electrodes in a bulb which is filled with a noble gas. The noble gas serves a few purposes. Due to its low thermal conductivity, it helps the lamp to start while minimizing loss of energy through heat.
How to dispose of high-pressure sodium light bulbs?
How to Dispose of High-Pressure Sodium Light Bulbs. Place the bulb in a padded container where it cannot break. The ideal container would be whatever specially designed box the bulb originally came in, or the one which contains the replacement bulb. If you don’t have such a box, use a cardboard box or other rigid container.
Is a high pressure sodium lamp a type of white light source?
High pressure sodium (HPS) lamps, a member of the high intensity discharge (HID) lamp family, are the most efficient white light source commercially available today.
Why is sodium lamp used as source of polarimeter?
Sodium (Na) Lamp is used in a polarimeter because it gives monochromatic light and also gives high-energy output. Line spectrum i.e. gives monochromatic light of 589nm. A polarimeter is a scientific instrument used to measure the angle of rotation caused by passing polarized light through an optically active substance.