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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 lamp – Wikipedia
produces light when the pressure within the arc tube is sufficient.
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.
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.
How does a sodium bulb work?
sodium-vapour lamp, electric discharge lamp using ionized sodium, used for street lighting and other illumination. When current passes between the electrodes, it ionizes the neon and argon, giving a red glow until the hot gas vaporizes the sodium. The vapourized sodium ionizes and shines a nearly monochrome yellow.
Why do high pressure sodium lights cycle on and off?
A high pressure sodium lamp cycling on and off usually indicates the lamp has reached the end of its normal life.
Do high pressure sodium lights need 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.
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).
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.
Are LED street lights better than sodium?
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.
How long do HPS bulbs last?
You’ll get a good 24,000 hours out of an HPS lamp. When they do start to degrade, though, HPS bulbs tend to depreciate in their blue spectrum output first. They typically need to be replaced about every 10 to 14 months.
Can you touch a high pressure sodium bulb?
The hps bulbs can not damaged by touching the outer glass globe like a halogen as there is no gas inside it, only vacuum, the hps bulb is inside the large glass globe to protect it. They come in as soon as the power does but may need a couple minutes to reach full light output.
Why do sodium lamps take time to glow?
Commonalities Between LPS & HPS Lights: Sodium vapor lighting typically requires a “warm-up” period in order to evaporate the internal gas into plasma. The lights become less efficient over time because they must use more and more voltage to produce the same lumen output as the light degrades.
Can I replace a high pressure 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.
How do you tell when my HPS bulbs are done?
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.
Does a security light have a ballast?
Incandescent and halogen lamps do not require a ballast. Like we mentioned, you just screw them into the socket, and you’re done. Fluorescent lamps and HID (high intensity discharge) light bulbs do require a ballast.Which light bulbs need a ballast? Technology Ballast dependent? Fluorescent All fluorescent bulbs require a ballast.
Do street lights have a ballast?
Ballast is still used in bulbs and tube lights to avoid current rise in the lights. Metal halide, mercury vapor, and HID are also the prime examples of lights using ballasts. Almost all major parking lot lights and street lights used this technology for about 30 years before LED started taking over around 2010.
Can you run a metal halide bulb in a HPS ballast?
Both Metal Halide and High Pressure Sodium bulbs are part of the HID family of bulbs. These bulbs cannot be interchanged without changing their ballast, the regulating element in all light bulbs. Their operation is a bit different and they therefore require different ballasts.
What is the difference between MH and HPS bulbs?
Metal Halide (MH) lamps provide more of the blue spectrum, which is ideal for leafy crops, and/or plants that are in a vegetative stage. High Pressure Sodium (HPS) lamps provide more yellow/red spectrum, which is ideal for most plants that are actively fruiting and flowering.
Will a mercury vapor bulb work in a high pressure sodium fixture?
Mercury Vapor (MV) lamps are most frequently used outside for parking and security lighting. They are the least efficient of the HID lamps (slightly less than fluorescents) and should be replaced with more efficient metal halide or high-pressure sodium lamps when possible.
What lights do professional growers use?
HPS lights and T5 lights are used by the majority of growers (68% and 67%, respectively) during at least one growth stage, and LEDs are used by more than a quarter of cultivators.
How much does a 600w HPS yield?
Sixteen plants that are grown under a 600-watt HPS lamp could produce about 37.5 grams or 1.3 oz of marijuana per plant. Under perfect, outdoor conditions, you can expect yields to extend to 500 grams or 17.5 oz per plant.
Can you mix HPS and LED?
The way HPS lighting should be installed is so that the light overlaps so shadows are reduced, and light penetrates in a horizontal direction. Having a mix of both HPS and LED lighting provides an ideal distribution of both diffuse and directional light.
What is the difference between high pressure and low pressure sodium lamps?
High-pressure sodium lamps emit a broader spectrum of light than the low-pressure lamps, but they still have poorer color rendering than other types of lamps. Low-pressure sodium lamps only give monochromatic yellow light and so inhibit color vision at night.
Which Colour light sodium vapour lamp gives?
Sodium vapor and mercury vapor lamps emit yellow and bright blue light, respectively. They are very efficient, and provide high-intensity light suitable for illuminating large, open areas.
