For example, GE Lucalox 600W bulbs produce 90,000 initial lumens (“initial lumens” refers to mean output over the first 100 hours), while Lumatek’s high-par 600W HPS lamps produce 92,000. As sodium vapor lights age, more and more voltage is required to produce the same amount of light until eventually the voltage exceeds the fixed resistance provided by the ballast and the light goes out (fails). So why are street lights being replaced with LEDs. Here, we will take a good look at the their differences and what growers can expect from each type. LED lifespan can be greater than 100,000 hours (more than four times that of LPS or HPS). Whereas the newest LED chips and drivers are now giving 190 lumens per watt effective. HIDs are very efficient compared to CFL and incandescent lights (120 lumens/watt source efficiency). Most values for LED system efficiency fall above 50 lumens/watt. 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). My High Pressure Sodium security light needs a new bulb. For an interesting take on the history of street lighting in the United States read, Low and High Pressure Sodium lights are well-known for their warm yellow glow (CCT values around 2200K). While this is increasingly becoming the case, there are still a few tradeoffs that need to be made when you choose LED: In particular, LED lights are relatively expensive. Brightness: This is measured in lumens on the label. It also means that more accessory parts are required in the light fixture itself in order to reflect or focus the luminous output of the bulb (thus increasing unit costs). Problems with the starter and/or improper matching of a starter and an HPS lamp may cause cycling even though the starter is otherwise working properly as the lamp is continually trying to light itself. But the jury is still out on whether they are truly superior to “full-spectrum” LED systems. This means, you can use a 120 Watt LED bulb with 18,000 lumens to replace your 400W HPS light bulb. Estimated Yearly Cost: This is based on a set rate of usage each day. As light is one of the two most basic foods for any plant (water being the other), it naturally has a big impact on final yield. This means that hobby gardeners and botanists can cultivate all year round without the limitation of seasons. Early LEP technology took decades to get off the ground for the precise reason that their colour rendering was so poor, with little coverage of the red areas of the spectrum. In the beginning, all we had was the standard, incandescent light bulb. 200-watt HPS bulbs provide about 22000 lumens of light. We do update our articles regularly so I’ll take your comment into account when we next update this one. Metal Halide lights average efficiency range between 70 and 100 lumens/watt. Outdoor Lighting, Continuous dimming typically alters the light output from 100% to 30% for High Pressure Sodium lamps. L70 in hours Our value engineering service can help.). That said, the price of LEDs are rapidly decreasing and as they continue to be adopted en masse the price will continue to drop. How come it’s been left out here? Have you ever grown using a combination of LED and HPS? These include the following: Considering the upside you might think that LED lights are a no-brainer. 200 Watt. When current passes through the semiconductor material the device emits visible light. In some cases (particularly with older HID bulbs) dimming can cause the light to prematurely expire. LED and HPS lights, while emitting the most lumens, are also the most expensive to run. HPS S/P ratio = 0.5. Originally I had a 1000W HPS in my flower tent, and I had to run an air conditioner to keep the heat down. Both LEDs and sodium vapor lights emit electromagnetic radiation across a small portion of the visible light spectrum, however, LEDs waste much less energy producing waste heat and they also provide an incredibly better variety of high color rendering index options to the user (thus eliminating the monochromatic black appearance of objects illuminated by LPS and HPS bulbs). Although sodium vapor lighting beats virtually every other technology in terms of energy efficiency (which is why it was chosen to illuminate the streets of so many cities), it loses out to LEDs. Snow falling on traditional lights like HID will melt when it comes into contact with the light. 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). 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. However, it is generally accepted that the most reputable vendors include both lm/W and the PAR output. I seriously think that I’m going to get a Hans panel in the near future (after vacation, that is). The only real potential downside to this is when LEDs are used for outdoor lighting in wintery conditions. I recently finished 2 grows of autoflowers, 5 plants each. The scotopic lumens provided by each light source would then be the following: LED scotopic lumens = 12,000 lm x 2.0 = 24,000 lm HPS scotopic lumens = 40,000 lm x 0.5 = 20,000 lm. The ultimate purpose of the device is to emit light, not heat. They produce steady light without flicker. Low and High Pressure Sodium costs vary depending on the specific type of light. This is usually overcome with LEDs by covering the light with a visor or facing the light downward towards the ground. ; “I am comparing LED to HPS for my cannabis operation. LEDs have faster switching (no warm-up or cool-down period). High-efficiency lighting is generally accepted to output at least 90 lumens per Watt (lm/W), with some bulbs achieving 150 lm/W or even higher. Although improvements have been made in HPS lighting technology, they are still generally considered poorer in their replication of daylight than other modern lighting systems. Why not compare a double ended his / mh . For this reason LPS lights are actually desirable as they minimize electromagnetic interference near facilities conducting astronomical observation. Because LED lights typically operate with multiple light emitters in a single luminaire the loss of one or two diodes does not mean failure of the entire luminaire.. Low and High Pressure Sodium lights can fail in a number of different ways. They are also adaptable for large public areas (which require powerful, efficient lights over a large area), road lighting (which offer significant color advantages over low and high pressure sodium lights), and parking lots. LED produces low-energy photons with a larger wavelength…”. I use a gavita 600w & a Chinese 1600 w led for both vegging & flowering, seems to work well, and it keeps the room at a good temperature,with just leds you will need a heater as someone else commented. 400 watt HPS 55,000 lumens or 137 lumens per watt In particular, they have been known to start fires in the event that the lamp is broken and the sodium metal is exposed. LED Retrofit, For example, 1100 lumens has brightness equivalent to a 75-watt bulb. So, what are some target LPW ranges for the lamp type you're buying? Since then they have gradually expanded their applications to include traffic lights, lighted signs, and more recently, indoor and outdoor lighting. Sign up for our newsletter and stay up-to-date! When buying Leds dont go by the rated wattage always go by what the Led actually pulls from the socket, the better quality Leds are always those with a higher draw from the socket, anything from about 400 actual watts upwards. Sensi Seeds therefore strongly advises you to check your local laws and regulations. Currently running 2x600W HPS. Low and High Pressure Sodium lights are well-known for their warm yellow glow (CCT values around 2200K). Thanks for your comment and your feedback . HPS bulbs typically emit 80% of their original rated output at the end of life (around 24,000 hours). Perhaps more importantly, in the last few years LED efficiency has surpassed that of even LPS and HPS lights and its efficiency improvements are progressing at a much more rapid rate. The final result is whiter light. That said, the price of LEDs are rapidly decreasing and as they continue to be adopted en masse the price will continue to drop. They lose out to LEDs in many cases because their system efficiency is often much lower due to losses associated with omnidirectional light output and the need to redirect it to a desired area. Lush Lighting: Provides 70,000 lumens and 1,200 μmoles when 2' away from LED … The up-front costs of an LED lighting project are typically greater than most of the alternatives. LED light costs are high but variable depending on the specifications. Currently, the highest-performing HPS bulbs produce around 150 lm/W. For example, the US-made Platinum P450 274W LED grow light (which is listed as equivalent to a 600W HPS) offers 11 bands ranging from ultraviolet to infrared. Much like fluorescent lights, modern LED lights are a wonderful solution for gymnasiums, warehouses, schools and commercial buildings. Starting is relatively simple with small tubes but can require significant voltage with larger lights. These lights are for production in layers (low ceiling) and interlighting, meaning lights throughout the canopy. The aim of this article is to compare both LED and HPS grow lights and help you make a better buying decision for optimal results. Annual flowering species follow very strict patterns of temperature, day and light hours, and light spectrum. We ran a twitter poll to understand how our viewers used different lights. Now we have compact fluorescent lamps (CFL) and light emitting diodes or LED for short. The problem with rating Leds is that Leds arent driven at their maximum wattages as that would make them burn out too quickly so for example an Led might be advertised as a 600w Led but would be driven at just over half that amount so might pull only something like 350w from the socket. Increasingly, grow lights are also rated in terms of PAR (photosynthetically active radiation) output, measured in µmol/s (the number of photons per second falling on 1m² of plant matter). Aside from the upfront cost of purchasing lights, growers must also consider the cost of electricity. Sodium produces an intensely yellow-orange light; this can be mediated by xenon and mercury, both of which emit light in the blue end of the visible spectrum. Then I can buy two interlights @220uMol @80W… From the use cases on the Canadian Philips Horticulture site, they use interlights and (different) top lights (@400 Volts) for their medical cannabis. Nice Blog dear, with the technology today will be more uses of these useful lights in the future. During start (while the sodium is still in solid form) the lamp emits a dim reddish/pink glow. All High Intensity Discharge lights (of which HPS and LPS are examples) emit light omnidirectionally. This causes light to be emitted, the colour of which varies according to the material used. On one side of the junction is a material that has been treated with extra electrons, while on the other side is material that has been treated to lack electrons. All the pro grows use HPS. I did everything I could to optimize yield, by topping, supper-cropping, and lollipopping the plants to maximize the buds to the top of the plants. To begin, let s unpack the information that exists on this complex topic. OK, I have the opportunity to buy some horticultural grow lights, professional grade, Philips branded. That's almost a 33 percent efficiency increase over the efficiency of the spiral CFL from GE. It gets even more confusing since factions for either Led or HPSclaim that the light works best for their cannabis plants. Since then they have gradually expanded their applications to include traffic lights, lighted signs, and more recently, indoor and outdoor lighting. Lastly, HPS and LPS lights are monochromatic, so they can mess with your color vision if you look at them for an extended period of time. LEDs fail by dimming gradually over time. Once knowledge increases of different lighting systems and their effects, they can be combined. But what would be the opinion of the people here? A diode is an electrical device or component with two electrodes (an anode and a cathode) through which electricity flows - characteristically in only one direction (in through the anode and out through the cathode). If so, using methods like the Scrog method would mean I would need less wattage for penetration? ... With lack of this information it is actually impossible to answer the question which growing method is most [per watt] efficient, or even to compare them. Low and High Pressure Sodium bulbs are fragile relative to LEDs. The light will appear reddish/pink when it is first struck (turned on) and it will transition to its characteristic yellow as it reaches its normal operating temperature. LEDs last longer than any light source commercially available on the market. LED grow lights don’t lose intensity like HPS bulbs and are typically just as bright until the very end of their life cycle with a general lifespan of 50,000-100,000 hours. LEDs are very easy to dim and options are available to use anywhere from 100% of the light to 0.5%. LPS lamps in particular are monochromatic which means that the objects illuminated by them appear shadowy black rather than the color you would see during daylight. LEDs can be extremely small (less than 2mm in some cases) and they can be scaled to a much larger size. The principal difference between low and high pressure sodium lights is the operating pressure inside the lamp. Correlated Color Temperature (read more here). LEDs emit light for 180 degrees. 150-watt HPS bulbs provide between 13000 and 16000 lumens of light. The technology pays the investor back over time (the payback period). Although previously seldom the case, newer HPS lights are now beginning to include PAR output ratings. Low pressure sodium vapor (LPS) lights are a specific type of gas-discharge light (also known as a high intensity discharge, HID or arc light). In particular, LED lights are relatively expensive. The downside is that there are very few options outside the narrow range to choose from. It is particularly useful for outdoor lighting where energy efficiency is at a premium (such as with municipalities lighting the streets or other common areas like parking lots.) When looking at those numbers it may not seem like a very big difference. 100 Degrees Celsius. I’ve always been a fan of Grolux tubes and found them to do th job perfectly. The bulb principally contains solid sodium metal inside a borosilicate glass tube that vaporizes once the lamp is turned on. LED stands for light emitting diode. I moved into a new house in a neighborhood where the houses were close together, and needed a “closed” system that did not need to be air conditioned. Check out the results below! All the while, LEDs use less energy to produce the equivalent HPS wattage.For example, Kind’s K3L600 lights have an actual wattage of 320. LED efficiency drops as current increases. HID lights can be manually dimmed through the use of different electric or magnetic ballast but the process changes the voltage input to the light and can consequently alter the light characteristics. They do, however, show degraded performance at significantly high temperatures and they require significant heat sinking, especially when in proximity to other sensitive components. Led equivalents to 400w and 600w Hps would also be Leds’ which draw those same wattages direct from the wall. In Europe, electricity is more expensive than in the US. The extremely low maintenance and replacement costs with LEDs is actually a major cost benefit over the long term. You get a variety of coloration, not available with other lights – what you get outdoors really. LED lighting is also ideal for the flowering stage as they produce a lot of lumens. Before making the conclusion which is betterLED vs HPSgrow lights, it is important to explore deeper into factors like growth stages, room to grow, efficiency and ease of use before making a verdict. My lighting was 2 X 100 W led floodlights, that I got from a DIY store, for 20 euros each piece. LED Lighting, As lighting becomes more and more energy-efficient, the same number of lumens is being achieved with lower and lower wattages. What has your experience been with lighting systems and which one do you prefer? We also talk about the different times that different spectrums may be used, and the different ways this can affect yield.

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