See the chart below to see an example of a LED spectral chart: To get you more familiar with LED grow light spectral charts for different phases of growth, below we have the HLG 300L Rspec (flowering phase/full cycle) and Bspec (vegetative phase) so you can compare them. There are many variables, so lets dig in! If we had included air conditioning, it would make LED grow light vs HPS lighting even more cost effective in less time. Continuous dimming typically alters the light output from 100% to 30% for High Pressure Sodium lamps. If you’re interested in the technical details of how an LED works you can read more about it here. LED Retrofit, LED stands for light emitting diode. Now we have compact fluorescent lamps (CFL) and light emitting diodes or LED for short. Typical source efficiency ranges 37 and 120 lumens/watt. are notorious for having the worst CRI values on the market. LED lighting has relatively high initial costs and low lifetime costs. . Stouch Lighting Services, Are they equivalent?How do we conduct the ultimate grow light review? Can you really increase yields and grow quality cannabis with energy-saving lights? CRI for LED is highly dependent on the particular light in question. HIDs are very efficient compared to CFL and incandescent lights (120 lumens/watt source efficiency). Well here’s a head-to-head comparison of the two followed by an in-depth discussion of each technology in turn. 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. Example: High Pressure Sodium (HPS) lights have only 3% blue light in a their grow light spectrum so are not used for the early vegging cycle as this would result in stretched plants and low productivity later on. 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. Omnidirectional lights produce light in 360 degrees. This is by far the biggest downside that needs to be considered. LEDs emit light for 180 degrees. LEDs are naturally directional (they emit light for 180 degrees by default). Wall Pack Lighting, LEDs have virtually no warm-up time. HPS bulbs typically emit 80% of their original rated output at the end of life (around 24,000 hours). The difference between led vs hps lumens per watt is greater because there's less "loss" of light. (Don't give up if you received an expensive proposal to upgrade to LEDs. Correlated Color Temperature (read more here). Minus 40 Degrees Celsius (and they will turn on instantaneously). Lighting Comparison: LED vs Metal Halide Lights Most people would really like to see the comparison if possible. The results of the life cycle cost analyses are summarized in the chart below. 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. Parking Lot Lighting, Retail Lighting, This is usually overcome with LEDs by covering the light with a visor or facing the light downward towards the ground. As you can see, LED lights use far less energy to produce light of a much better quality. (a device that converts visible light into electrical current). You can get in touch with us 24 hours a day, 7 days a week. LEDs are very efficient relative to every lighting type on the market. Most values for LED system efficiency fall above 50 lumens/watt. Click edit button to change this text. This product adopt the high power LED as the light source, using dozens of high power DMX Emitters of 1 watt LED. 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. 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. Watch time lapse footage with real results. Additionally, HPS lamps pose a potential fire hazard, especially when you dispose of them. Additionally, there are serious waste disposal issues with sodium lamps. You’ll note the light intensity hardly fades at all on the Spider Farmer compared to the older boxy purple LED grow lights. As mentioned, the operating life of a typical Metal Halide bulb … The up-front costs of an LED lighting project are typically greater than most of the alternatives. This is typically an advantage because light is usually desired over a target area (rather than all 360 degrees around the bulb). That said, a very broad spectrum of CRI values is available ranging generally from 65-95. LEDs can be extremely small (less than 2mm in some cases) and they can be scaled to a much larger size. LED is the newest and by far the best lighting technology available, using less wattage to produce high levels of brightness. Several other web sites claim to compare LED grow lights, with lists of the “best LED grow light reviews of 2015”, but these have no explanation of how these “best” choices were made or even what lights were examined. Any defective LED bulb will usually fail within this time. HPS light setups have a cheaper initial start-up cost, but the price gap between comparable HPS and LED grow has become much smaller as LED grow light setups have become more and more affordable each year. A recent addendum to the original report examined LED street lights that could match the pole spacing provided by incumbent 150W HPS street lights. There are four major advantages to LED lighting: In addition to the major advantages, LED lights also offer several smaller perks. LED equivalent wattages to traditional light sources can only be approximate, as they will vary depending on the colour temperature and quality of the bulbs being compared. 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. Shenzhen China. LEDs have faster switching (no warm-up or cool-down period). LEDs have a light spread of 180 degrees, and so more light is actually directed towards the subject in question. Do LED grow lights yield more? LEDs are available in a wide range of color temperatures that generally span from 2200K-6000K (ranging from “warm” yellow to light or “cool” blue). We are going to tackle the question which light bulb type reigns supreme? High pressure sodium bulbs may flicker and/or cycle on and off as the bulb reaches the end of its useful life. LED efficiency drops as current increases. 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). LEDs Superior Operating Life. absorbed by the ballast and/or lost to the environment. Although High Pressure Sodium lamps emit visible light across a slightly more broad spectrum than Low Pressure Sodium lamps, they are still very limited. In particular, LED lights are relatively expensive. High pressure sodium vapor (HPS) lights, similar to LPS lights, are a specific type of gas-discharge light (also known as a high intensity discharge, HID or arc light). LEDs fail by dimming gradually over time. High Pressure Sodium lamps emit visible light across a slightly more broad spectrum than Low Pressure Sodium lamps, they are still very limited. Once the arc is ignited it melts and evaporates metal salts (sodium) internal to the device. If such a lamp breaks, the exposed sodium metal can result in a fire. Low Pressure Sodium lamps are notorious for having the worst CRI values on the market. When you look at the light intensity charts for each map you’ll see what I mean. 70 watt HPS = 40 watt LED; 100 watt HPS = 50-60 watt LED; 150 watt HPS = 80-90 watt LED; 250 watt HPS = 90-125 watt LED; As you can see, LED lights use far less energy to produce light of a much better quality. Typically they fall around 25 on a scale of 100 where 100 is the best possible. Red is the ideal spectrum for stem growth, flowering and fruiting. 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 bottom line is that having lost their traditional advantage of being the most energy efficient bulb on the market, there’s very little reason to use a sodium vapor light when LED lighting is available. The ultimate purpose of the device is to emit light, not heat. Tempor reprehenderit accusantium quibusdam iste accusan. In the beginning, all we had was the standard, incandescent light bulb. 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