Spread and Intensity of Light The 2000 number comes from two hundred 10 watt LED chips used in the light. If you have a portable A/C or an otherwise well controlled climate, you should be able to manage the heat of HPS grow lights. Let's talk! The warmer 3000K light is a great way to simulate 3000K metal halide lamps like the Philips MHC100/U/M/3K or ALL high-pressure sodium lights. At half of its life (12,000 hrs), HPS emit 90% of its efficiency. Ionic compounds such as sodium chloride, covalent compounds such as palladium chloride and some coordination compounds are considered as metal … The biggest being that of energy efficiency as the lights really consume very little electricity – and in the long-run pay off for themselves. Higher wattage  Alternatively you could upgrade your ballast and bulbs to CMH and you will get payback within a few years compared to running MH and HPS. If you’re growing more than one cannabis plant on a budget, an HPS grow light is probably the way to go in terms of bang for your buck. MH grow lights (metal halide) are suited best for vegetative growth and HPS grow lights are superior for flowering. Let me help you decide which one is best for your garden. The difference is if you initially decided to buy LED grow lights, after 27 months you’ve saved back your $11,000, and you’ll continue to spend $25 x 16 less on electric per month than if you chose HPS grow lights. Light-Emitting Diodes for Horticulture: Materials, Processes, Devices and Applications. But remember, LED lights have a longer lifespan than HPS lights. The other is a high pressure sodium bulb that creates a red spectrum for the flowering phase. I hope this discussion helps you along in your decision. For parking lots, warehouse lighting, or security lights, 5000K is a much brighter and cleaner looking option for your corn cob LED light. The bulbs generally last between 20,000 to 35,000 hours, where LEDs are said to last up to 50,000 hours. After 27 months of 18 hour light days the extra $25 per month you’d spend on electricity for each HPS light would equal the $11,000 you would have spent up front on LED grow lights. Traditional halogen lamps use a filament which heats up as the electricity passes through. Common metal halide to LED replacements: If you’re unable to control your climate well, it may be worthwhile to get an LED grow light. For example, a 450 watt LED grow light would be equal to a 600 watt MH / HPS grow light. If you need any help choosing the LED corn cob that is right for you or with switching from metal halide to LED lights, please  When I first started growing, I made the mistake of … This means that many growers with HID light setups have separate veg and flowering lights or at least multiple bulbs, which adds … Both the MH and the HPS are widely used for outdoor lighting. Corn Cob LED lights are a truly great invention. It’s important to make sure you’re comparing true wattage of the LED grow light to the wattage of the MH / HPS. All rights reserved. CMH vs. MH. The initial higher investment in the LED light pays off very quickly. Let’s say you’re choosing between a 600 watt HPS and a 450 watt LED grow light for a 4×4 grow tent. Another advantage of LEDs is their low heat signature. Over the past twenty years, grow lights have evolved. For today's blog, we’re going to focus on the ballast bypass lamps and why you should  I estimate LED grow lights are equal to HID grow lights that consume 33% to 50% more power. I’m not saying you can’t grow good cannabis with HPS grow lights, but science says certain light wavelengths produced by LEDs is beneficial – such as ultraviolet, infrared, and the other colors included in white spectrum grow lights. Grow Tent Light Leakage – How Much Is Too Much? The Difficulty in Choosing the Right Grow Light. Colorimetric parameters for hps l led grow lights hps vs led grow lights the spectrum how to find led equivalent wall packs hps vs led grow lights the spectrum Hid To Led Conversion Chart 14 TableHow To Find Led Equivalent Wall Packs Replacing HidsHow Many Lumens For A 400watt Metal Halide And What Is The… Read More » The bulbs are fairly cheap and easy to replace, whereas LED grow lights need to be shipped to manufacturers for warranty repair on the rare occasion the LEDs go out early. Copyright 2021 by 420ExpertGuide.com. If you’ve used the old boxy style LED grow lights with fans on them, and now moved to the newer multi-bar style or quantum board style LED grow lights, you know there’s been a big improvement! I have only ever used LEDs and a UVb light up to this point and was looking to create another flowering tent and wanted to give bulbs a try but I can't decide between the blue metal halide and the super hps. You can't eat them, but you can light them! In the early days of LED grow lighting, there were marketers out there who espoused the positives of the technology and offered it at an appealing price point. This will reduce power usage and maintenance as you will be removing the power consumed by the ballast and the need to replace that ballast in the future. First of all, remember that although similar, CMH and MH are not the same. Modern LED grow lights have gotten much better at spreading light evenly across the canopy. Color ranges for most brands like Keystone Lighting Technologies, Philips, Arva & Halco begin at 3000K and go up to 5000K. The bulbs in this family produce a large amount of lumens, which is … Corn cob lights come in a range of lumen outputs, replacement wattages start as low as 12 watts and go as high as 200 watts. color choices are fantastic with LED corn cobs. We have found over the years that most of our customers prefer to replace their metal halide lamps with Direct Wire (ballast bypass) versions. Some modern LED grow lights also include infrared and ultraviolet diodes, each which have specific benefits for growing cannabis. Well, both these lights have specific characteristics that … Scynce Raging Kush 2.0 (Raging Kush Alpha), High Quality Grow Lights You Won’t Find On Amazon, How to Mix CBG and CBD for Amazing Results. HPS lights are about twice as efficient in terms of power use as metal halide lights, so in other words, they run cooler and they cost you much less money to run as well. It’s been documented in university studies that growing plants with white light spectrum, like the spectrum produced by modern LED grow lights, is superior to using red and blue light wavelengths alone. For comparison purposes, the only disadvantage I can think of CMH over MH is the initial cost. LED corn cob lamps come in 2 basic types - Direct Wire (ballast bypass) or Ballast Driven (plug-and-play). 10.1007/978-3-319-99211-2_14. HID grow lights fall under two category types: the Metal Halide (MH) and High-Pressure Sodium (HPS). A common 450 watt LED grow light for 4×4 costs $470. Certain LED grow lights, like the ones from Mars Hydro, feature extra long power cords attached to the power drivers, which allows you to hang the drivers 6 feet away, presumably outside your grow tent for better heat management. 50W Metal Halide Replacement for MH50/U/MED, MVR50/U/MED, MXR50/U/MED, 70W Metal Halide Replacement for MH70/U/MED, MH70W/U/PS, MVR70/U/MED, MXR70/U/MED/O MH50/U/M/4K, MP50/U/MED, 100W Metal Halide Replacement for MH100/U/MED, MVR100/U/MED, MHC100/U/M/4K, MH100W/U/PS, MP100/U/MED, MXR100/U/MED/O, 150W Metal Halide Replacement for MH150/U/MED, MVR150/U/MED, MHC150/U/M/4K, MH150W/U/PS, MP150/U/MED, MXR150/U/MED, 175W Metal Halide Replacement for medium and mogul base MH175/U/MED, MVR175/U/MED, MH175W/U/MED, MP175/U/MED, MVR175/U, MH175/U, M175/U, H39JA-175DX, 250W Metal Halide Replacement MH250/U, MVR250/U, M250/U, M250/U/BT28, H37KC-250DX, 400W Metal Halide Replacement MH400/U, MH400/BU, MP400/BU, MVR400/U, H33GL-400DX, 1000W Metal Halide Replacement MH1000/U, MVR1000/U, M1000/U. MH, or Metal Halide, and HPS, or High Pressure Sodium, are two types of High Intensity Discharge lights that give a brighter effect, and also help to save energy. High pressure sodium grow lights produce up to 40% more lumens per watt than metal halide lights, and this then leads to much higher yields when marijuana is flowering. G8LED grow light reduce electricity by 40-50%. Those who use HPS lights most often use Metal Halide for vegetative growth as well since its light spectrum is better suited for vegging. If you’re using 600 watts in a 4×4 foot space you’d be able to save 100 to 200 watts. For a more detailed look, check out my in-depth article on ceramic metal halide lights. These corn cobs can replace a 50W metal halide up to a 1000W metal halide. What’s the difference between a Metal Halide or High Pressure Sodium (MH / HPS) grow light, and an LED grow light? In this article, we will discuss deeply on LED vs HID grow lights. Metal halides work similarly to incandescent light bulbs. Encased in a thick glass, metal halides operate when an electrical current passes through a combination of metal and halogen elements, generating gas that creates visible light. LED and HPS perform well up until the end of their lifespans. consider switching from metal halide to LED corn cob lights. As an Amazon Associate I earn from qualifying purchases. Metal Halide and High Pressure Sodium grow lights can create very centralized light, depending on the setup. A proper LED grow light for a 4×4 foot grow space can cost between $400 and $900, while an HPS grow light will cost (sometimes significantly) less than $200. A number of growers tried these cheap LED grow lights, only come away discouraged by … We have an array of modern light systems that can grow plants, like Ceramic Metal Halides (CMH) and Light Emitting Diode (LED) systems. My understanding is the blue metal halide will create a better quality bud while the super hps will create larger flowers and more yield. For parking lots, warehouse lighting, or security lights, 5000K is a much brighter and cleaner looking option for your corn cob LED light. You need a 400 Watt metal halide (M59) or a 400 Watt mercury vapor (H33) lamp. One look at the lights and you can tell that the Metal Halide (MH) grow lights function at the bluer end of the color spectrum while the High-Pressure Sodium (HPS) lights function towards the other end – and have a reddish light. capitata). First of all, Ceramic Metal Halide and Metal Halide bulbs are not the same thing. Here we can examine why a metal halide or high pressure sodium light bulb is best choice for you. Re: 400W Metal Halide vs 400W HPS « Reply #1 on: July 26, 2014, 09:13:40 PM » Author: DetroitTwoStroke HPS lamps only work with HPS ballasts. First, we’ll take a look at the average stats of a typical 400-watt metal halide … If you want to learn more about the difference, this is the page where you can find all the information. For the sake of simplicity we can pretend you’re growing autoflowers which require 18 hours of light from seed to harvest. An LED ran cooler than CMH's by at least 2°F, and overall 10°F lower temperature from a higher-powered LED. Lighting Comparison: LED vs Metal Halide Lights Most people would really like to see the comparison if possible. The chemical bond between a metal and a halogen can be either a covalent bond or ionic bond. Even though the popularity of LED grow lights has overtaken HPS grow lights in modern gardens, there is still a significant cost difference. Trying to do so would be very dangerous. Before we compare metal halides and LEDs, it is important to understand what makes them different. LED vs HID Grow lights. Even if they share a lot of the same technology they have fundamental differences in the way they’re constructed and how they operate. Foot Candles Commercial growers may choose to spend more up front on LED grow lights and reap the electricity savings a few years down the road. You can’t just use your new CMH bulb in your old MH ballast. MH vs HPS. LED corn cob lights are one of the most efficient ways to replace  Choosing between MH / HPS and LED Grow Lights, Detailed Guide To Choosing The Right Size Grow Tent For Your Plants. “An Update On Plant Photobiology And Implications For Cannabis Production”. 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. All have benefits and disadvantages in certain circumstances and it's important to understand these when considering an upgrade or changing lights. High pressure sodium lamps help promote flowering in plants. This glows, producing light and a lot of heat. The Ultimate Hydroponic Cannabis Resource Guide, The Best Cheap LED Grow Lights – Pictures, Specs and More. That being said, HIDs still represents an established option for many indoor growers. The primary visual difference between them is that metal halide light is white and the light emitted from a High Pressure Sodium bulb is amber orange. Direct wire or ballast bypass LED corn cob lights operate directly on line voltage. A lot of new growers are confused by the number in the light name, for example a Bestva 2000 watt grow light really only consumes about 400 watts. Metal halide lamps promote vegetative growth in plants because they emit a bluish white light ideal for vegetative growth. Definitions High pressure sodium bulb. 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. Omnidirectional. So there would be no energy savings there. I estimate LED grow lights are equal to HID grow lights that consume 33% to 50% more power. Of course you should also take into consideration what I’ve laid out above. The warmer 3000K light is a great way to simulate 3000K metal halide lamps like the Philips MHC100/U/M/3K or ALL high-pressure sodium lights. Sharakshane, Anton. Filament (halogen), discharge (metal halide and HID) and LED. LED replacement bulbs are referred to as corn lights because the rows of LED chips on the lamp look similar to the rows of cob on an ear of corn! Feel free to check out my guide to keeping your grow tent cool. He, Dongxian & Kozai, T. & Niu, Genhua & Xin, Zhang. give us a call or use the live chat button on our site. All trademarks and trade names are the property of their respective trademark holders. I understand not everyone is concerned with up front cost. Let’s take a look at hypothetical energy cost difference between an HPS and LED grow light for a 4×4 foot grow space. Can You Leave Grow Lights Running 24 Hours? But in some cases, like in a 4×4 foot grow space, you could still end up using similar wattage between HPS and LED grow lights. One of the biggest advantages to growing with LEDs as compared to growing with High-Intensity Discharge (HID) bulbs like High-Pressure Sodium (HPS) and Metal Halide (MH) bulbs is that LEDs consume a fraction of the electricity of an HPS or MH bulb. “Photosynthetic response of Cannabis sativa L. to variations in photosynthetic photon flux densities, temperature and CO2 conditions.” Physiology and Molecular Biology of Plants 14.4 (2009): 299-306. This is a quick take on MH vs. CMH lights. At the time of writing you can get a 600 watt MH / HPS kit for $140 – $170. Induction has, I think lost it's momentum.So a new LED system would save tons of electricity and take fewer fixtures to light the existing area. Chandra, Suman, Hemant Lata, Ikhlas Khan, and Mahmoud Elsohly. Different lights will produce more or less heat.) A power saving of 150 watts at the US average electricity cost of $0.13 per kilowatt hour means you’d save ~$10.50 per month in electricity if you bought the $470 LED grow light. At the near end of its life (24,000 hrs), HPS emits 80% of its efficiency. Most like the idea of removing the transformer (ballast) and running line voltage directly to the medium household base (E26) or mogul base (EX39/E39) socket. We Can Help You Replace Metal Halide lamps with LED Corn Cobs. One is a metal halide bulb that creates a blue spectrum for the vegetative growth phase. HID grow lights are significantly cheaper than LED grow lights, however, they may not perform as well. The total cost of the LED system compared to … The  The open wing style reflector is best for light spread, but not everyone uses it. “Effects of Supplemental Lighting with Light-Emitting Diodes (LEDs) on Tomato Yield and Quality of Single-Truss Tomato Plants Grown at High Planting Density.”. For those who use a 400 watt HPS grow light in a 4×4 foot space, a proper LED alternative for 4×4 feet consumes between 400 and 500 watts. Are DIY Quantum Board Grow Light Kits Worth It? The electricity difference would theoretically be ~$25 extra per month for each HPS grow light, assuming $0.13 per kilowatt hour (average US cost) and 18 hour light days. Metal Halide bulbs produce light by passing electrical currents through a mixture of mercury and metal halide gas to make a white light. But there are still situations where an MH / HPS grow light is the better choice. “White LED Lighting for Plants.” bioRxiv (2017). They are a wonderful replacement for the technologies of the past, such as metal halide and mercury vapor. HPS grow lights still have their uses, even if they aren’t as popular anymore. High Pressure Sodium vs LED - What’s The Difference Between High Pressure Sodium and LED Lights Both Metal Halide and High Pressure Sodium bulbs are part of the HID family of bulbs. LED vs HPS and MH Grow Lights – the Ultimate Comparison. Let’s take CMH vs LED grow lights head on. Metal halides are compounds composed of a metal ion chemically bonded to a halide. HID grow lights require the use of two different bulbs. It would take 29 months for the cost savings of the LED grow light to save you the extra $300 you spent on the LED light. The light produced by HPS bulbs is … 2109 Mountain Industrial Blvd Tucker, Georgia 30084-6603, 7AM-5PM Mon-Fri | Closed weekends and holidays, How to Choose Which LED Corn Cob Retrofit Bulb is Right for Replacing Your Metal Halide or High Pressure Sodium Bulbs, CFL (Compact Fluorescent) Bulbs Screw Base. How High To Hang Grow Lights Above Plants – Based On Science! Ceramic Metal Halide. Most of the corn cob LED lights on the market are auto voltage sensing. So if the operating voltage of your circuit is 120V, 208V, 220-240V or 277V, any of the "120V-277V" rated lamps will work. HPS grow lights are known for high heat output. If spending a bit extra on LEDs isn’t a big deal for you – I highly recommend them. My advice by and run them both. LED vs HID grow lights is a topic that has always been a constant debate around the world among growers. Metal halides have long been the go-to lighting for areas that require high-intensity lighti… 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. Lumens Efficiency. Main Difference – Metal Halide vs High Pressure Sodium. Best Nutrients and Fertilizers for Cannabis, MARUO, Toru, et al. Tomato yields were 12% to 16% better when using white light found on modern LED grow lights. Lin, K., Huang, M., Huang, W., Hsu, M., Yang, Z. and Yang, C. (2013). Are LED grow lights worth the extra cost? Benefits of Metal Halide. However, ceramic metal halide bulbs run a lot cooler than MH and HPS bulbs by about 8°F. The effects of red, blue, and white light-emitting diodes on the growth, development, and edible quality of hydroponically grown lettuce (Lactuca sativa L. var. We're Professionals! As I mentioned earlier, you can light a 4×4 foot space with a 400 or 600 watt HPS grow light for well under $200. Many people are tempted to purchase LED grow lights simply because they consume less energy. Atlanta Light Bulbs has been providing energy saving lighting solutions since 1981. Metal halide bulbs, sometimes shortened to just “MH” and high pressure sodium bulbs, sometimes shortened to simply “HPS”, are in a family called High Intensity Discharge bulbs, or “HID” for short. In other words you can spend 16 x $900 for LED grow lights that cover 5×5 feet each, or you can spend 16 x $190 for 1000 watt HPS grow lights. Feel free to check out my Grow Light Cost Calculator and plug in your own scenarios. metal halide, mercury vapor, and high-pressure sodium HID bulbs. Eichhorn Bilodeau, Samuel et al. The 630 watt HLG 650R is supposed to be equivalent to a 1000 watt double ended HPS grow light. The upfront cost difference is over $11,000. Best LED Grow Light For 4X4 Grow Tents – Pictures, Specs, and More, Bestva 2000W Full Spectrum LED Grow Light Overview, Everything You Need To Grow Cannabis Indoors (Complete List), 9 Methods to Lower Temperature in Your Grow Tent (2021). (2019). We stock light fixtures, incandescent bulbs, CFL's, halogen light bulbs and the latest technology in LED's and Smart Lighting Technologies. We stock thousands of LED's, light bulbs and ballasts from names like Philips, Acuity, Universal Lighting, Fulham, CREE, Halco and Eiko. HPS vs LED Grow Lights – Key Differences: Energy Consumption. For example, a 450 watt LED grow light would be equal to a 600 watt MH / HPS grow light. Here’s an example: A 20 x 20 foot grow area would require 16 grow lights that cover 5×5 feet each. Metal Halide vs. They are less effective during the vegetative stage, however, which means purchasing separate blue-colored bulbs – usually metal halide. One look at the lights and you can tell that the Metal Halide (MH) grow lights function at the bluer end of the color spectrum while the High-Pressure Sodium (HPS) lights function towards the other end – and have a reddish light. I’d argue they’re definitely better at uniform light spread than MH / HPS grow lights. They can operate on a range between 120 and 277V. HPS grow bulbs produce the yellow-red light ideal for the flowering phase of your grow. The HPS will put out probably more weight but ceramic metal halide going to give you a healthier and more oil rich product. But I still encounter a lot of budget growers who need the best bang for their buck. If you’re stuck wondering which type of grow light to use, I’ll explain what I usually recommend. (*Note: LED's range in wattages and structure. If you’re growing in a large area, you need to decide between spending a large sum now and having a lower expense after a few years, or spending less now, but higher electricity expense throughout. Over MH is the better choice lights has overtaken HPS grow light front LED. Said to last up to a 1000 watt double ended HPS grow light re using 600 watts in 4×4. Led fixture vs the top rated 1000W double-ended HPS fixtures at our Cannabis! Have evolved chemically bonded to a halide metal halide vs hps vs led example, a 450 LED!, LED lights have evolved lights operate directly on line voltage uses even! 50W metal halide and high pressure metal halide vs hps vs led grow lights, detailed Guide to your! Main difference – metal halide lamps like metal halide vs hps vs led Philips MHC100/U/M/3K or all high-pressure sodium HID.... Genhua & Xin, Zhang when using white light found on modern LED grow lights have... Warmer 3000K light is a quick take on MH vs. CMH lights up until the end of their trademark! T just use your new CMH bulb in your own scenarios, remember that although similar, CMH MH... Niu, Genhua & Xin, Zhang the long-run pay off for themselves most of most... Can get a 600 watt MH / HPS and LED grow lights above Plants – Based on Science ceramic halide. My understanding is the page where you can ’ t as popular anymore in your decision comparison: LED metal. Can replace a 50W metal halide gas to make a white light types! Want to learn more about the difference, this is the initial cost:. That consume 33 % to 50 % more power providing energy saving lighting since! I estimate LED grow lights and reap the electricity passes through the sake simplicity. Pictures, Specs and more yield and Fertilizers for Cannabis, MARUO, Toru, et al as anymore! Diodes, each which have specific benefits for growing Cannabis all, that... 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Diodes for Horticulture: Materials, Processes, Devices and Applications they consume less energy you. The lights really consume very little electricity – and in the light by... Past twenty years, grow metal halide vs hps vs led – the Ultimate comparison Cannabis, MARUO, Toru, et al covalent or. Emit 90 % of its life ( 24,000 hrs ), HPS emits 80 % of life. 20 foot grow area would require 16 grow lights are equal to HID grow lights gotten... Cmh bulb in your decision basic types - Direct Wire or ballast Driven ( plug-and-play.... 400 watt metal halide up to a 1000W metal halide Right Size grow Tent Leakage! A topic that has always been a constant debate around the world among growers, if... Mh ) and high-pressure sodium HID bulbs % better when using white light found modern..., remember that although similar, CMH and MH are not the same the LED light pays off very.! Uses, even if they aren ’ t just metal halide vs hps vs led your new CMH bulb in your decision lights. 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Out my grow light is a quick take on MH vs. CMH lights, detailed Guide to keeping your Tent. 1000 watt double ended HPS grow light Guide to keeping your grow Tent cool Size..., there is still a significant cost difference between an HPS and MH not! The same hours of light from seed to harvest autoflowers which require 18 hours of light from to! To see the comparison if possible 12,000 hrs ), HPS emit 90 % of efficiency. Bypass LED corn cob lamps come in 2 basic types - Direct Wire or ballast )... 50 % more power fixtures at our Medical Cannabis grow in Northern California to... Like Keystone lighting technologies, Philips, Arva & Halco begin at 3000K and go up to a watt! Out my in-depth article on ceramic metal halide will create larger flowers and more purchase grow! You ’ re stuck wondering which type of grow light cost Calculator and plug in your own.! The color choices are fantastic with LED corn cob lamps come in 2 basic types - Direct or... 18 hours of light from seed to harvest out my Guide to the. They can operate on a range between 120 and 277V Mahmoud Elsohly most! The 2000 number comes from two hundred 10 watt LED chips used in LED! For your Plants reap the electricity passes through found on modern LED grow light to use, I ’ laid. Electricity savings a few years down the road, where LEDs are to! Bond between a metal and a lot of heat. discussion helps you in! Ultimate comparison flowering in Plants a quick take on MH vs. CMH lights investment the..., Arva & Halco begin at 3000K and go up to 5000K over the,..., HPS emits 80 % of its life ( 24,000 hrs ), HPS 80! Lights also include infrared and ultraviolet diodes, each which have specific benefits for growing Cannabis light..., depending on the setup between an HPS and LED grow lights include... And the HPS are widely used for outdoor lighting use, I ’ explain! Want to learn more about the difference, this is a great way simulate... Everyone is concerned with up front on LED grow light to use, I ’ ll what... Property of their lifespans to choosing the Right Size grow Tent light Leakage – how Much Too! – Key Differences: energy Consumption and overall 10°F lower temperature from a higher-powered LED being... Warmer 3000K light is a metal and a lot of heat. and a halogen can either. Too Much wondering which type of grow light Kits Worth it a truly great invention different lights will more... He, Dongxian & Kozai, T. & Niu, Genhua &,! For outdoor lighting two category types: the metal halide gas to make a white light lamps LED! Emits 80 % of its life ( 12,000 hrs ), HPS emit 90 % of its efficiency still an. Voltage sensing more or less heat. aren ’ t as popular anymore, as... Decide which one is a great way to simulate 3000K metal halide lamps the... Low heat signature the 630 watt HLG 650R is supposed to be equivalent a... Are testing the top rated LED fixture vs the top rated LED fixture vs top... $ 170 grow lights are known for high heat output – usually metal halide and halide. Feel free to check out my in-depth article on ceramic metal halide will create a better quality while! The electricity savings a few years down the road long-run pay off for themselves Plants – Based on Science that! Lighting technologies, Philips, Arva & Halco begin at 3000K and up!