Sodium, mercury and xenon are the three elements inside the tube, used at different stages of ignition (and for different colored light). High pressure sodium (HPS) lamps start their operating life with a high lumen output that degrades over time, a … For the last several decades, most street lighting in the United States has used high-pressure sodium (HPS) technology, which emits orange-yellowish light. Most values for LED system efficiency fall above 50 lumens/watt. A lot of people ask us what the difference is when it comes to LED streetlights vs HPS streetlights. You can find higher efficacy … LED Area Lights have a much easier immanence than High Pressure Sodium lights. We're sure you've been under HPS lights before, and they cast an unsightly yellow color over everything! Not convinced? That term is primarily used in discussing efficiency behind lighting--how much light you get per energy invested. LED Area Lights have a much easier immanence than High Pressure Sodium lights. For your security, the system will automatically sign you out after 14 days. What’s the Best Battery for Solar Street Lights? They lose roughly 15% of their heat emissions which adds to their inefficiency. The main benefit of using HPS is that they are the only light source with a similar efficiency to … LEDs last longer than any light source commercially available on the market. 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. Woods L1730 Cci Modern High Pressure Sodium Security Farm Light, Powder Coated Housing, (1) Ed17 Lamp, 120 V, 75 W, 70-Watt 4.1 out of 5 stars 23 $62.94 $ 62 . The heat emitted from the light either wafts out into the great wild or is absorbed by the ballast. The biggest differences between LED and High-Pressure Sodium lights are color temperature and CRI. We're invested in getting the best possible lights to you. The Difficulty in Choosing the Right Grow Light. However, there is exactly one other type of lighting that beats HPS in that category, and that is Light Emitting Diode (LED). All Rights Reserved. They must be, because many cities are switching to LED! High-Pressure Sodium (HPS) lamps are a type of gas-discharge light that, as the name suggests, operate at a very high internal pressure.They consist of a narrow arc tube within a bulb. LED wins this bout. 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. (And Why Greenshine). High Pressure Sodium lights have a high maintenance cost, because they require monitoring and more frequent replacement of both bulbs and parts. High Pressure Sodium: LED: Winner: Start Up: High Pressure Sodium Lights have long warm-up time, usually around 15-20 minutes. High-pressure sodium lights produce heat--not something you'd really want when your main concern is just illuminating something. By continuing, you agree to our Terms & Best Uses for High Pressure Sodium. 2.) Stay Connected Last edited by poiihy; 06-28-2015 at 02:35 PM . This makes them fantastic for security reasons since they can be attached to motion sensors and instantly turn on with the slightest hint of movement. Many municipalities are weighing the benefits of both LEDs and high-pressure sodium (HPS) as they consider their street-light options. We are testing the top rated LED fixture vs the top rated 1000W double-ended HPS fixtures at our Medical Cannabis grow in Northern California. In fact, LED bulbs use between 40-75% less electricity than a HPS fixture. Organization. Clearly, LED. That's not exactly the most pretty of colors. LED wins this bout. In fact, they're roughly as efficient as LEDs in terms of their light output for each watt of energy used. If you have any questions, please call us at, CANOPY, MAILBOX, & BUS STOP SOLAR LIGHTING, What Are the Best Outdoor Solar Lights? High pressure sodium bulbs are efficient electrical light sources that produce a wide spectrum of bright yellow light that is good for street lights and greenhouse use.. Metal halide bulb. Find the Mean Lamp Lumens of Your High Pressure Sodium Lamp. Here's where LED really shines,  so to speak. What do you like best about LED vs High Sodium Pressure lights? Power can be done relatively large. Small volume, light, strong wind resistance While upgrading to LED provides a lot of benefits, high pressure sodium (HPS) lamps still provide some of the most efficient lighting available. The bulbs last so long they beat out all the competition in terms of longevity and so don't need a replacement for several thousands of hours, unlike HPS. Indeed, high pressure sodium (HPS) lights are generally unmatched in terms of energy efficiency. Here are Some Factors You Need to Look For. LED beats out HPS in this category regardless. Who’s the winner? Comparison Chart HPS vs. Turning that heat back into light is ideal--or by using a light that emits very little heat whatsoever. LEDs have a light spread of 180 degrees, and so more light is actually directed towards the subject in question. We hope this was a revealing article! Higher yields. 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. The difference between led vs hps lumens per watt is greater because there's less "loss" of light. It's marginal, but we're sure when weighing options that a little more time is better than a little less. For Example, yourname@domain.com. 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. Before Led light come to the market, the high pressure sodium(HPS) lamp is not bad, such as HPS for road lighting has the following advantages and defects: 1. LED fittings are instantly at full output. If you're considering a switch or are convinced here of the superiority of LED lights, feel free to contact us for further information. The biggest being that of energy efficiency as the lights really consume very little electricity – and in the long-run pay off for themselves. The benefits of LEDs are heavy in comparison to HPS lights, and even better when you combine them with solar panels. Are LED street lights more efficient than High Pressure Sodium? This product adopt the high power LED as the light source, using dozens of high power DMX Emitters of 1 watt LED. A standard "return on investment," if you will, for light. High-Pressure Sodium: Hot, Hot Heat. In this case, LED lights win again since hardly any heat comes from them. LED. High Pressure Sodium lights have often been seen as the best grow light available for amateurs and professionals alike, and the key to their popularity is their incredible raw light output. Contestant #3: High-Pressure Sodium (HPS) Grow Light The yellow glow of High-Pressure Sodium street lamps. Notice to Bureau of Street Lighting customers As a measure of caution in relation to COVID-19, the Bureau of Street Lighting is limiting the time that public counters are open for the public. HPS light costs differ based on the particular fixtures, but are cheap compared to LEDs. Definitions High pressure sodium bulb. HPS Grow Lights. Two varieties of such lamps exist: low pressure and high pressure. High pressure sodium lights, with their familiar orange glow, are quickly being replaced by new, energy efficient blue-white LED (light emitting diode) lighting. High Pressure Sodium area lights are most commonly seen on the road and in parking lots. That's not to say LEDs don't emit heat whatsoever, but the difference with LED vs HPS here is that there's a lot less heat produced. This safety precautions makes them high popular when purchasing lights for day to day use. HPS vs. The popularity of that technology is not just due to its energy efficiency. Finally, HPS lamps are not the best for the worker in an industrial setting. But, there’s a reason … LED lights have essentially no maintenance cost and must be changed rarely with infrequent monitoring. The High-Pressure Sodium bulb originated in the 1970’s and became ubiquitous in street and warehouse lighting. A quick search reveals that a lumen is defined as "the SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid angle of one steradian from a uniform source of one candela." Why bother buying a kind of light if half of what it emits goes the opposite direction of where you want it to go? HPS lights have been associated with high yields for a long time. LED lights have a wider variety of color temperatures along with higher CRIs. LED lights have essentially no maintenance cost and must be changed rarely with infrequent monitoring. High Pressure Sodium lights have a high maintenance cost, because they require monitoring and more frequent replacement of both bulbs and parts. Low and High Pressure Sodium lights are the only light whose source efficiency compares to LEDs (values range between 50 and 160 lumens/watt for LPS and slightly less for HPS). The poor color rendering and limited overall light quality means it does not well reflect the human circadian rhythm. That's not the case with HPS lights—these can take up to 10 minutes to get to full brightness. 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. LED lighting is programmable and can change according to the amount of concurrent natural light in a space. LED: Lifetime: HPS Lights have good lifespans – around 14,000 hours – though this is significantly less than LEDs. The comparison above between High Pressure Sodium grow lights vs LED grow lights clearly indicates that the LED grow lights have a significant advantage when compared to HPS lights. High pressure sodium lights work by creating an electric arc through vaporized sodium metal, while additional materials and gases work to start the lamp and control the its color. DURHAM, NC-- Inspired by the successful Los Angeles street lighting upgrade, where many of the city’s 140,000 high-pressure sodium (HPS) street lights were converted to Cree® LED luminaires, San Luis Obispo, Calif. selected Cree, Inc. (Nasdaq: CREE) to help improve the city’s sustainability efforts.City officials collaborated with Pacific Gas and Electric Company (PG&E) to … 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. Do you think the HPS can be dethroned? Sunlite 03610-SU LU70/MED High Pressure Sodium Light Bulb, 70 Watts, ED17/MED, Medium Base (E26), ANSI Code S55, 6000 Lumen, 24000 Life Hours, Clear, 2100K 4.4 out of 5 … When I first started growing, I made the mistake of … Plus, LEDs have a more accurate color reproduction. Prepare yourselves, we're breaking down a big comparison in street lighting today! We don't prefer to baffle our readers with jargon, so for our reasons lets just define a lumen as the standard of how light is measured when we discuss LED vs HPV. HPS vs LED CRI: When comparing high pressure sodium vs LED lighting options, LED wins with its high color rendering index (CRI). However, LED lights still win in this category--surprise--with a whopping 25 thousand hours of usage time vs a max of 24 thousand hours with HPS before failure. The reigning champion of grow lights. Light Emitting Diode (LED) Lamps - $/Lamp/Month 0.80 0.80 High Pressure Sodium Vapor Lamps - $/Lamp/Month 0.80 0.80 Low Pressure Sodium Vapor Lamps - $/Lamp/Month 0.80 0.80 Metal Halide Lamps - $/Lamp/Month 0.80 0.80 Induction Lamps - $/Lamp/Month 0.80 0.80 All Other Lamps - $/Lamp/Month 0.80 0.80 Delivery Service Generation9 There's been several power outages and fires across the nati... Biggest Concerns About Solar Lighting: What to Buy and What Not to Buy. Check the image below. Share it with us today! The efficiency for LED lights ranges between about 40 and 120 lumens per watt. 94 © Copyright 2009-2020 HomElectrical Electric Supply. High-pressure sodium lights produce heat--not something you'd really want when your main concern is just illuminating something. (Hint: Yes). They tend to cast a very ugly yellow glare on subjects in their light throw, so color reproduction underneath them is shoddy at best. Conditions. HPS street lighting is being replaced by street lighting technologies that emit “white” light – primarily LED, due to its higher efficiency and longer life. Mean lamp lumens is a lamp’s average lumen output over the course of its life. The two cars side-by-side appear to be the same color, and yet one of them is actually, Concerns about Solar Waste (and When it Comes to Solar Lighting). LED area lights are top of the line bulbs. Are Solar Street Lights Worth the Money? Why bother buying a kind of light if half of what it emits goes the opposite direction of where you want it to go? One often overlooked benefit of LED over HPS lights is that LEDs turn on instantly. Does Solar Lighting Work with Cloudy Skies? So less maintenance requires less money—you get the idea. How Do High-Pressure Sodium Lights Affect Workers? High-pressure sodium lamps emit a broader spectrum of light than the low-pressure lamps, but they sti high pressure sodium system. For blog updates and free giveaways like us on, Storage & New street lighting technologies, such as induction or lumens allowing street lights with lower wattages and lower photopic lumens to replace existing street lights specifications around Photopic/Scotopic adjustments for departments to test, implement and benefit from this new technologies. HPS vs LED Energy-Savings: High pressure sodium fixtures are not as energy efficiency as LEDs. By Darkest tree - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=64836710. Due to the low color spectrum on high pressure sodium lights, the light emitted is limited to a warm deep yellow light. Here are some main differences between LED streetlights vs HPV streetlights. Here comes the king! LEDs require virtually no maintenance. High Pressure Sodium lights have excellent lifespan as well (although not as good as LED) which is why they have traditionally been used for outdoor street lighting in municipalities where energy efficiency is at a premium. We'll admit that HPS lights have fantastic longevity, which is oftentimes why they're chosen to light parking lots and wide public areas. Please fill in your project details and one of our lighting experts will get back to you within 24 hours. More energy goes into the actual light emittance. That completely negates an entire application of security for HPS lights. Typical lifespan values for an HPS bulb are around 24,000 hours. For blog updates and free giveaways like us on Facebook and follow us on Twitter! They are more efficient and have longer lifespans than High-Pressure Sodium lights. Please provide a proper Email Address format. The lumens per watt rating is actually higher for HPS, but where these lights lose is that they're omnidirectional, so you get a lot of light striking objects that aren't intended to be lit. Advantages: Low color temperature yellow light, rain and fog weather, strong penetrating power. Like Metal Halides, High Pressure Sodium lights are omnidirectional, which wastes light and makes them less efficient. The answer to this lies in lumens. All white-light technologies – including LED – emit more short-wavelength light than HPS. 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. Hint: LED streetlights win this battle. The system is generally comprised of high pressure sodium (HPS) lighting fixtures with only around 750 units of light emitting diode (LED) fixtures installed. 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