The mercury inside the bulbs is a hazardous material that can present a waste disposal issue at the end of light’s life. Foot candle is a measure that describes the amount of light reaching a specified surface area as opposed to the total amount of light coming from a source (luminous flux). Find out which is more efficient for plant growth when the scientific results are revealed! The light doesn’t arrive at full power until the salts are fully evaporated into plasma (which can sometimes take up to 10 minutes). There are several reasons for this to include the fact they waste very little energy in the form of infrared radiation (much different than most conventional lights to include fluorescent lights), and they emit light directionally (over 180 degrees versus 360 degrees which means there are far fewer losses from the need to redirect or reflect light). The spectrum of visible emissions from an LPS light is actually very close together (589 and 589.6 nm, virtually monochromatic) resulting in the colors of illuminated objects being nearly indistinguishable. Here, we will take a good look at the their differences and what growers can expect from each type. The big problem I had was odor control. Each Or is a lumen not a lumen, maybe LEDs are better at throwing light down in a street light application. How does one create the same spectrum of natural light with artificial lighting? Diodes are generally made from semi-conductive materials such as silicon or selenium - solid state substances that conduct electricity in some circumstances and not in others (e.g. LEDs are probably the best contenders in terms of spectrum at this stage, with newer full-spectrum models offering up to 11 bands of light wavelengths most needed by plants. Were you satisfied with the results from HPS? Using the table, we can see the mean lamp lumen output for our customer’s 250w high pressure sodium wall pack is 27,000 lumens. For example, 1100 lumens has brightness equivalent to a 75-watt bulb. I am very happy, also the buds are loaded with trichromes. That's nearly 75 lumens per watt. While your actual use may vary, the dollar amount noted will give you a good baseline. I go for LED lighting. I have a 600w and nobody can tell me what an equivalent LED light would be. 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. 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. Currently, the highest-performing HPS bulbs produce around 150 lm/W. LEDs are very efficient with efficiencies approaching 200 lumens/watt. If you were going to buy a new lighting system, what factor is most important to you? Meanwhile, a 60W CFL will give off nearly 3,000 lumens. Were you satisfied with the results from LED? 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. 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). Is that the only thing it determines? By far the most efficient HID variant is the Low Pressure Sodium lamp whose source efficiency can range from 60-190 lumens/watt. Indoor cultivation has changed the way that growers cultivate anything. Inaccurate Photons do not have amplitude therefore photons of the same wavelength have the same energy. The downside is that there are very few options outside the narrow range to choose from. Mmol/s is increasingly seen as superior across the board for horticultural lights, as it is a measure of light usable by plants. Low and High Pressure Sodium lights emit heat that is. I, anybody know about led? (Don't give up if you received an expensive proposal to upgrade to LEDs. LEDs are solid state lights (SSLs) that are difficult to damage with physical shocks. Both technologies are very efficient. HPS S/P ratio = 0.5. LED has virtually zero maintenance costs and the frequency with which bulbs have to be changed out is by far the best on the market. However, when we consider LEDs, light output has already exceeded 300 lumens per watt in the lab. Lumens per watt (lm/W) refers to the energy efficiency of lighting: how much visible light you get for a given amount of electricity. LED Retrofit, A common measurement of source efficacy is lumens per watt , which reflects the amount of light produced by the source divided by the power required to operate it. As the gases heat, they emit light. You get a variety of coloration, not available with other lights – what you get outdoors really. Another way to decrease the cost of lighting is, as mentioned earlier, to start with fewer lights and increase as the plants mature. Nice, really looking forward to the results. They also have the advantage of emitting some light in the UV spectrum. HPS bulbs typically emit 80% of their original rated output at the end of life (around 24,000 hours). 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. We also talk about the different times that different spectrums may be used, and the different ways this can affect yield. You can read more about the impact of directional lighting by learning about  a measurement called “useful lumens” or “system efficiency.”. LED and HPS lights, while emitting the most lumens, are also the most expensive to run. The difference is that sodium vapor lights were the most efficient technology of the 1970s while LEDs are the modern day equivalent. High pressure sodium bulbs may flicker and/or cycle on and off as the bulb reaches the end of its useful life. I want to change from the old HPS to the new LED because the price of power in Australia is disgusting. 5. Additionally, there are serious waste disposal issues with sodium lamps. 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). These new full-spectrum LEDs may or may not list lm/W rating. LEDs are extremely energy efficient relative to every other commercially available lighting technology. Foot candle is a measure that describes the amount of light reaching a specified surface area as opposed to the total amount of light coming from a source (luminous flux). I want to thank you for this excellent information!! Lighting Education, Typically, growers begin a grow cycle with fewer lights. Thanks for your comment and your feedback . 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. Once knowledge increases of different lighting systems and their effects, they can be combined. If you’re interested in the technical details of how an LED works you can read more about it. 150-watt HPS bulbs provide between 13000 and 16000 lumens of light. In particular, LED lights are relatively expensive. This is especially true of those bulbs in linear tubes. My lighting was 2 X 100 W led floodlights, that I got from a DIY store, for 20 euros each piece. I’ve taken a bit of a closer look into this topic. Low and High Pressure Sodium costs vary depending on the specific type of light. Foot Candle ratings are very application specific and vary case by case so it is difficult to say if LPS/HPS or LED would be better performing without the specifics of the particular situation. If you checked this debate five years ago, HP… 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. As indicated by the name, “high” pressure sodium vapor lights operate at a higher internal pressure. The largest selling point of LPS and HPS lights is the cheap selling price, the high energy efficiency (low operating costs), and the relatively long lifespan. These require about 6000 lumens. It is an inevitable fact that once you get keen on the growing business, you will immerse yourself into the focus of which is the best grow lights. Much like fluorescent lights, modern LED lights are a wonderful solution for gymnasiums, warehouses, schools and commercial buildings. Cannabis Grow Report: Sensi Seeds Northern Lights Automatic, seedlings and young plants don’t use as much light. LED Vs HPS Grow Lights comparison with regards to; Compare lumens to watts Lumen is the term used to describe the total amount of light emitted by a light source, while wattage merely indicates the amount of energy it uses. Still got crappy yields, I discovered the 100W LED flood light style lights online, the price was .00 per light. Indoor greenhouses allow for full control over the growing medium, light availability, water, humidity, and temperature. 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. LEP lighting technology is still miles behind HPS and LED, and does not produce yields as big as other lighting systems. Lush Lighting: Provides 70,000 lumens and 1,200 μmoles when 2' away from LED … Metal Halide lights average efficiency range between 70 and 100 lumens/watt. When looking at those numbers it may not seem like a very big difference. (a device that converts visible light into electrical current). The up-front costs of an LED lighting project are typically greater than most of the alternatives. Well here’s a head-to-head comparison of the two followed by an in-depth discussion of each technology in turn. So, what are some target LPW ranges for the lamp type you're buying? The efficiency for LED lights ranges between about 40 and 120 lumens per watt. Nice Blog dear, with the technology today will be more uses of these useful lights in the future. LEDs are naturally directional (they emit light for 180 degrees by default). 200-watt HPS bulbs provide about 22000 lumens of light. This means they emit light for 360 degrees, requiring fixture housings or reflectors to direct a large portion of the emissions to the desired target area. However, it is generally accepted that the most reputable vendors include both lm/W and the PAR output. The principal difference between low and high pressure sodium lights is the operating pressure inside the lamp. It is very much the opposite of a photovoltaic cell (a device that converts visible light into electrical current). In some cases (particularly with older HID bulbs) dimming can cause the light to prematurely expire. at certain voltages, current levels, or light intensities). As the season changes from summer to autumn, the light spectrum changes, as do the other factors that affect flowering. By dividing 860 by 60 watts you can calculate that for each watt of power it uses, the bulb gives out 14.3 lm/W. I was researching LEDs, and they seem to be less efficient: a 70 watt HPS bulb produces around 6,000 lumens and the 70 watt LED fixtures produce around 4,000. LEDs have faster switching (no warm-up or cool-down period). Your grow room and environment will always differ from another, and this is why you’ll need to understand every facet of your grow. In a 90X90X160 cm tent, I got very decent harvests of 100-300 gr per plant (many different varieties, with differing sizes and yield potential – white label’s northern lights auto gave me 110 gr each of the two plants I grew). Most values for LED system efficiency fall above 50 lumens/watt. I can also witness an improving effect on smell and taste – better photosynthetic abilities due to the leds possibly? 100 Degrees Celsius. For this reason, to achieve maximum yields, annual flowering plants should be exposed to different lights at different stages during their growth cycle. The question of LED vs HPS lights can also be affected by what continent you are living on. It has revolutionized the lighting industry. Low Pressure Sodium lamps are notorious for having the worst CRI values on the market. If you were going to buy a new lighting system, what factor is least important to you? i want to purchase quality leds for my home kitchen tell me about it. In practice, light source efficacy of LEP (also known as “HEP” (high-efficiency plasma) or even simply “plasma”) grow lights range from 80 – 100 lm/W. The efficiency (or “luminous efficacy”) of lighting systems can be expressed in a basic equation: output (lumens) divided by total units of power consumption (Watts). So a 60W tungsten bulb may emit 800 lumens of light, but a 60W LED light could release over 2,400 lumens per bulb. The first step is to use the known PPF/Watt (Photosynthetic Photon Flux/Watt, the measure of light used by plants per unit of energy consumed) of … In other words, if you’re not looking for a warm deep yellow light, you’re going to have to use something besides Low or High Pressure Sodium to achieve it. Like most legacy lamps HPS and LPS lamps operate by using a glass bulb. In some circumstances heat emissions could be beneficial, however, it is a generally a bad thing to emit heat as it represents an energy inefficiency. Sodium vapor lighting has been around since the middle of the 20th century (in commercial production since the 1930s) and it generally represents a high efficiency way to provide lighting over a vast area. Typically they fall around 25 on a scale of 100 where 100 is the best possible. 6. At the time this article was originally written, we were getting a lot of questions about the differences between HPS and LED, but not really about neon. 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