led vs sodium street lights

The LED street lights recommended by the manufacturer representatives would cost more than twice as much to own and operate as the incumbent technology over the life of the streetlights, primarily because the LED street lights required narrower pole spacings to meet the recommended practice for illuminating collector roads, and the cost of the poles per mile dominated the life cycle costs. Both Metal Halide and High Pressure Sodium bulbs are part of the HID family of bulbs. Indeed, high pressure sodium (HPS) lights are generally unmatched in terms of energy efficiency. What’s the Difference Between Sodium Vapor and LED Lights? Like Metal Halides, High Pressure Sodium lights are omnidirectional, which wastes light and makes them less efficient. High Pressure Sodium Vapor (HPS) lights are a specific type of gas-discharge light (also known as a High Intensity Discharge, HID or arc light). However, there is exactly one other type of lighting that beats HPS in that category, and that is Light Emitting Diode (LED). They lose roughly 15% of their heat emissions which adds to their inefficiency. In fact, they're roughly as efficient as LEDs in terms of their light output for each watt of energy used. Here are some main differences between LED streetlights vs HPV streetlights. Typically, above 70 CRI. Beside this, LED lights are significantly much better than the most fluorescent lamps as well. Typically, they fall around 25. The popularity of that technology is not just due to its energy efficiency. But the choice is up to you! Conventional lighting is a game of yesterday As indicated by the name, “high” pressure sodium vapor lights operate at a higher internal pressure. The large color spectrum of LEDs creates a widespread light output for better visibility and safety. They also have the worst CRI of any light source, falling around a 25 and like Metal Halides, require a warm-up period and may flicker or cycle on and off at the end of life. Who’s the winner? 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. Both technologies are very efficient. HPS lights have a very narrow color spectrum, limited to warm deep yellow light. The new lights use less energy, dramatically cutting carbon emissions and saving money. 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Comparison Chart HPS vs. You can find higher efficacy … They also have a longer lifespan (bulb life) with about 10-15 years, which means less maintenance costs, which means less money on replacement bulbs and parts. 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.. Two varieties of such lamps exist: low pressure and high pressure.Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor lighting, such as street lamps, where they are widely used. Sodium lamps are very efficient sources of light; but the sheer yellow light they produce restricts them to street lamps and other outdoor uses. The purpose of street lights is to illuminate the surroundings – including the road and adjacent areas in a manner that human beings using the area can adequately perceive the area and its surroundings. As mentioned previously, HPS lighting gives off a little more yellowish hue than the true white glow of the LED lights. Street lighting technology comparison light technology life time lumens per watt incadescent light 1.000 - 5.000 11 - 15 mercury vapour light 12.000 - 24.000 13 - 48 metal halide light 10.000 - 15.000 60 - 100 high pressure sodium light 12.000 - 24.000 45 - 130 low pressure sodium light 10.000 - 18.000 80 - 180 fluorescent light 10.000 - 20.000 LEDs last longer than any light source commercially available on the market. We are funded by CNBM Group, a Fortune 500 enterprise and the largest Led Street Light Vs Sodium firm in China. LED lights have a long lifespan, and are very energy efficient, which is why they have been gaining momentum over the past few years. The principal difference between low and high pressure sodium lights is the operating pressure inside the lamp. Where LEDs really shine, however, is in their system efficiency (the amount of light that actually reaches the target area after all losses are accounted for). LED lights have a high color rendering index, and put out a “daylight” color (natural white light) which provides excellent visibility. LEDs are typically 40,000 - 60,000 Hours. Even so, HPS fixtures put off more of a yellow hue due to color limitations (compared to newer LED technology). The losses associated with Omnidirectional light output rates them below LED. Jul 28, 2016 | Blog, LEDs, Lighting, Parking Lot Lighting. Looking up was like staring into the sun. Although LED and High-Pressure Sodium are both popular options for area lights and outdoor fixtures, let's explore the difference between the two and why you should consider LED lighting. But when you factor in the efficiency, maintenance costs, and bulb life of high pressure sodium vs LED, this LED initial cost becomes the only disadvantage as far as we can see. Traditional yellow sodium street lights are steadily being replaced by white LED lamps. The main benefit of using HPS is that they are the only light source with a similar efficiency to LEDs and maintain luminescence quite well. High-pressure sodium lamps are currently the main lamps used in public lighting. For the last several decades, most street lighting in the United States has used high-pressure sodium (HPS) technology, which emits orange-yellowish light. High pressure sodium fixtures are not as energy efficiency as LEDs. LEDs are available in the full range of CRI values. HPS vs LED CRI: When comparing high pressure sodium vs LED lighting options, LED wins with its high color rendering index (CRI). HPS vs. Phoenix: HPS to LED Street Lighting Conversion The City of Phoenix currently maintains over 95,000 street lights along more than 4,800 miles of public streets. LED: Lifetime: HPS Lights have good lifespans – around 14,000 hours – though this is significantly less than LEDs. LED. LED fittings are instantly at full output. We're discussing the comparisons between light-emitting diode (LED) and High-Pressure Sodium (HPS) lighting systems, and hopefully by the end of this lesson we can educate you and ensure your wallet stays happy. When comparing high pressure sodium vs LED lighting options, LED wins with its high color rendering index (CRI). An LED street light is an integrated light that uses light emitting diodes (LED) as its light source.These are considered integrated lights because, in most cases, the luminaire and the fixture are not separate parts. The comparison between solar powered LED light and conventional light is that the LED lamps have a greater lifespan and electrical efficiency that is many times better than the conventional lighting system. The two different technologies are entirely different methods of producing light. found on commercial properties, schools, and other types of businesses. HPS vs LED Energy-Savings: High pressure sodium fixtures are not as energy efficiency as LEDs. In manufacturing, the LED light cluster is sealed on a panel and then assembled to the LED panel with a heat sink to become an integrated lighting fixture. LED Street Lights The high power LED street lights LU1 are designed for the street lighting demand and fully meets the special requirements of street lighting. Lower power consumption – LED street lights (67W) slash energy use by 52% over Mercury Vapor lamps (138W) and 26% over a high pressure sodium lamps (90W) Higher efficacy (50 lm/W) – LED street lights exceed mercury vapor’s 31 lm/W. Over the lifetime of the lamp the LEDs: use less power, have a more ‘white’ light, can be integrated with active and passive sensors, are quiet, and the LED ‘bulbs’ will last years and years. All white-light technologies – including LED – emit more short-wavelength light than HPS. 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