Intense light has high PPFD and low-intense light has low PPFD. A flowering plant needs a minimum of 500umols per metre squared of PPFD. The light loses strength as it travels from source to endpoint (from grow light to plant). You should only buy a grow light with published output in PPFD and with a PAR intensity map showing the PPFD readings across the recommended grow area. Do they lose efficiency over time and if so how much? Reply. The 600w HPS will output about 700umols (PPFD)so you would need at least three of them, ideally four. Calculate how big a grow light you need for your grow space here. But it happens sometimes that this kind of plant development does not let the solar light get through the lower leaves and that causes low productivity because the lack of a total photosynthesis. The farmer can choose DLI as a reference in light … Full daylight sun at noon in the summer is around 2000 μmol/ m 2 /s. There you go, take your result and use it in the instructions above! Example: 1.9 x 0.85 x 0.9 x 0.95 = 1.38umol/watt, Grow light system efficiency calculator tool. The plants love the light but I haven’t used the meter because I’m a dummy. I’m working on one hectar corn grow cultivar with high seed density. by MIGRO Editor | Nov 22, 2017 | Grow lighting basics, Grow lighting tips, LED Vs HPS | 16 comments. Can anyone help me with this led light i have for grow tent space of 1.2m 1.2m 1.8m heigh all reflected i side the tent just not sure on this ligh i have time to send back and buy a braned one i know more about all info i have on tbe light is…. The PPFD is a measuring point to a specific location on your canopy, and is expressed in micromoles per second per square meter. We have used an average in the calculation sheet. : 36.63 Voltage forward per cob: 34.89 Lumens per watt: 182.54 Heatsink riser thickness / number of fins / fin's length: 0.3in/6/0.95in Heatsink area per inch: 100.94 cm^2 Total heat watts: 256 … To do your own calculation follow these steps: Select your grow light technology. Could you please tell me the formula to use with my particular light and how to convert The Lux into PPFD into DLI. The lower quality systems efficiency may be as low as 70% and the best 95%. Coverage Area: 2.5*2ft for Veg, 2*1.5ft for flower The PPFD is the flux density of photosynthetic photons. However, a vigorous indoor plant’s growth and flowering depends on the light thresholds reached at … You still have to be careful though as many of the large CFL bulbs of 100W and greater are badged as a certain wattage but draw much less. In reality, however, obtaining a light source's exact SPD is not an easy task for the average grower - it requires expensive spectrometer equipment. Most lighting companies quote PPF per Watt and do not publish PPFD per Watt. It is not possible to convert Lux to PPFD absolutely accurately without providing the light source's spectral power distribution (SPD). I’ve never seen anyone provide this info before. Given my special agronomical circunstance ¿ could you recomend to me the ideal strip? Its a 1200w light but says actual power 200w so is that the actual power output of the light lost wish i just bought a more common used light for the plants dont want to start with a wrong light or not enough light.. thanks for any help.. Hi Andy, unfortunately many grow lights are advertised with misleading wattage and coverage figures. It’s measured in units called micromoles (μmols). Day Light Integral (DLI) A cumulative measurement of the total amount of light (photons) that … Example: 1.9 x 0.85 x 0.9 x 0.95 = 1.38umol/watt. That’s the type of quality you need to grow abnormally large marijuana plants. Lighting for plants is different from lighting for humans. : 18.56 Cob efficiency: 56.34% Power watts per sq.ft. And at least you have another solution, given your notorious led grow knowlege, I arrived to the conclution I have no choice but to use a hard work waterproof strip, trying to give light only to the posible maximun of lower leaves. When you know the PPFD, you know the amount of PAR light that reaches your crops at each point measured. Much appreciated Mitch, Your email address will not be published. Conversion - PPFD to Watts. ) by Growmau5 (great LED YouTuber btw as I'm sure you all know) on the Vero 29 COB's and how efficient they are in Micromoles/per Watt and how you can use this to calculate the 'Photosynthetic Photon Flux' (PPF) and 'Photosynthetic Photon Flux Density' (PPFD) in a given grow space based on your light setup and the area your growing in to then work out the number of micromoles/per watt/ per … Light energy for humans is measured in lumens, with light falling onto a surface measured as illuminance with units of lux (lumens per square meter) or footcandles (lumens per square foot). PPFD is measured over a one meter square area in “micromoles per square meter per second” and expressed as μmol/m2/s. Important: this measurement uses the PPF of a lamp and not a ppfd value! The  human eye is most sensitive to a yellowish-green color at a peak at 550nm. This site uses Akismet to reduce spam. How much light (inside the PAR range) do i get per used Watt of electrical energy. You would need at least four of those lights to get reasonable growth in a 1.2m x 1.2m tent. Red/Blue LED grow lights usually show higher efficacies compared to full-spectrum LEDs. Thats about 50cm x 50cm or one small plant. If we instead take PPFD measurements at the center of every 6-inch square segment throughout the entire 5x5 foot advertised growing area for this competitor's 630 watt light, we can get a better picture of its actual PAR coverage over the entire advertised footprint. Applying the watt/sq ft principle results in a value of 20 watt/sq ft in the 4x4’ tent and a value of 35 watt/sq ft in the 3x3’. 23 Watts or the 100W incandescent equivalent? Reply. PPFD is a ‘spot’ measurement of a specific location on your plant canopy, and it is measured in micromoles per square meter per second … Wouter on 15th July 2018 at 2:24 pm Same as for the heights. Size: approx.310*210*60 cm. Efficiency- Watt (Wattage) One more important term in horticulture lighting is wattage. If PPFD maps (more on this later) aren’t presented by the lamp manufacturer, the watt per square foot principle may be the only reasonable way to assess a lamp’s ability to light up a grow space. Advanced platinum series P600 is equipped with high quality of LEDs and efficient auto-switching drivers to prevent power overload. This page gives an overview of the most important units of measurement related to light for plants. Values of PPFD are normally expressed using units of mol m −2 s −1. I’ve got a question: for CFL bulbs, they often quote two wattage numbers. PPFD is the amount of light photons that hit a surface (your plant canopy) in one second. Other Posts. Can a LUX Meter accurately measure light output of “white led”? 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. 1200W LED Grow light This new multiplier is 4.4 % lower than the old multiplier, which … How much light  do i get per used Watt of electrical energy, Efficacy Calculator for Horticulture lighting systems, Your email address will not be published. Radiation within the range of 400 to 700 nm (PAR) per second.The PPF Value of a horticulture lamp is measured with an integrated sphere. A flowering plant needs a minimum of 500umols per metre squared of PPFD. PPFD based on canopy area: 929.09 PAR watts per sq.ft. During bright daylight in a warm and sunny place, the sun's PPFD … How much light (inside the PAR range) do i get per used Watt of electrical energy. What your plants actually need, however, is likely to be much … 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 the most common grow light technologies. Lumen: about 1600 lumens That’s 20% less than the rated wattage. Input voltage: AC 85-265V 50/60Hz Many thanks. How intense light (PPFD) to expose various species to and for how long.Light intensity, or rather, how densely packed light is with photons, is measured in micromoles per meter squared per second, µmol/m2/s. Foot-candle: one lumen per square foot. Hello Andy, the light you have bought probable delivers about 1umol of PAR light to the plant canopy (PPFD). Your email address will not be published. For example, a 250W bulb with 450 PPF. Example: HPS SE – 1.9umol/watt, Select your ‘Optics’ type. specifications The Efficacy can alter tremendousely, depending on the used spectrum. Thats about 50cm x 50cm or one small plant. the SI unit of illuminance, equal to one lumen per square metre. The PPFD is the flux density photosynthetic photon. You can use this calculator to accurately size your grow light for your grow area. I also bought the A881E lux meter. Thank you. PAR can be also measured in W/m 2, but is usually expressed in μmole.m 2 /s (moles of photons), which is called photosynthetic photon flux density (PPFD), and is not a SI unit. Where PPF is measured in umol/s, PPFD is measured in umol/m2/s. MIGRO uses a hanging system and lenses to focus 95% the emitted PAR light onto the plant canopy. 1-49 Pieces $265.00. You would need 6 or 7 of them to equate to our MIGRO 400 (thats what we recommend for a 4×4). Simply speaking – it’s the strength of the light that reaches your plants. When doing research on plant lamps you will be confronted with countless metrics and abbreviations - Watt, PAR, PPFD, PPF etc. 2G Per Watt Yields PPFD Superior Than 1000W HPS Professional COB Led Grow Light Full Spectrum VEG FLOWER Buttons Led Grow Light. The top tip is to use silver mylar to minimise reflective light losses to only 10%. Your light will cover 120/500 = about 0.25 metres squared. PAR AND PPFD IN WATT COMPUTATION Broadly speaking, the minimum amount of wide-spectrum light needed by a cannabis plant is around 9,000lm per square metre, while the optimal is over 20,000lm/m². Optimal distance between plants and LED grow lights. Thank you Shane for sharing your knowledge! It allows to quantify on a given surface, at a given distance from the lighting, the number of PAR photons incidents per second. The Efficacy can alter tremendousely, depending on the used spectrum. PPFD stands for Photosynthetic Photon Flux Density, and is the same as PPF, but takes surface area into account as well. I need a strip led lamps the most hard wording and waterproof ones. Low quality reflective walls such as matt white or budget tent lining will also result in relatively high light loss. Save my name, email, and website in this browser for the next time I comment. Your email address will not be published. Hey Shane , I bought the original Array 2 without red enhancement when they first came out. Our LED’s will maintain 80% of their initial output after 50,000 hours (about 8 years growing). a 2m x 2m tent is 4m2 total area. For example the Electrox 250W CFL I used recently in a test drew only 200W from the wall. What is the optimal distance between plants and LED grow lights? That’s where PPFD comes in. are just some of the numbers that can be used to Comparison of lighting systems for horticulture can … Hi, yes they can and you can setup successfully with a lux meter as you can map out the hot spots and weak areas with a lux meter. View Angle of LED: 90/120 degree Mixed We have tested many different grow light systems and cross checked the actual results with the calculator and the outcomes are very close. Your light will cover 120/500 = about 0.25 metres squared. The main variable that impacts PPFD is distance from the source of … What is the life expectancy of the LED’s? Actual Power: about 120W±10% power, much better than the same product in market Some lamp types perform significantly better than others (operate at higher efficacy, PPE or µmol/J) and will require fewer watts to … The direct analogy to lux, the PPFD is expressed in micromoles per second per m² (µmol / s / m²). LED Quantity: 120PCS exclusive 10W Double Chips LED This is a common question among indoor … Directly analogous to lux, the PPFD is given in micromole per second per m² (µmol/s/m²). PPFD, or photosynthetic photon flux density, refers to the number of PAR photons that land on a given surface each second. Example: Silver Mylar – 90%, Select your power supply efficiency. You can then work out the ratio of PPFD per watt by taking these two values and doing some simple math. How much watts requires to produce desired PPFD. Required fields are marked *. You can use the grow light efficiency calculation tool for most grow light systems such as CFL, HPS,  MH, CMH and LED. If fixture taking 100 watt and giving output of 90 watt means its efficiency is 0.9, In simple terms higher efficiency more PPFD… PPFD. PPFD PPFD (Photosynthetic Photon Flux Density) measures the amount of micromoles of photons striking a square meter per second (often written as umol/m 2 /s, μmol/ m 2 /s, or μmolm-2 s-1). In your formula, the CFL “watt” corresponds to which ? When looking at the actual power draw of this light, you'll see this light has a very high PPFD output per watt (PPFD/WATTS). Impressive stuff. Whilst the PPF value gives information on the total photon flux within the PAR region, the PPFD value determines the photosynthetic photon flux density. See our PPF to Lumens calculator here Need to convert lux to PPFD micromoles per second per meter squared? Hi Tony, the calculator tool uses the power consumed by the bulb, not the equivalent incandescent bulb number. You need about 600umols PAR light per m2 (PPFD) so you need 4 x 600 = 2,400 umols PAR light (PPFD). Spectrum: 410-475nm , 620-660nm ,3000K 6000K ... PPFD (or photosynthetic photon flux density) is a measure of the amount of PAR (measured as PPF) that actually arrives at the plant. 50-99 Pieces $260.00. The light footprint map clearly shows how applying the principle can give a rough estimate of how well a LED grow light illuminated a grow space, but again, looking directly at PPFD values gives a clearer … Bruce on 30th August 2018 at 5:10 pm In the world of lumens, PPFD would be most similar to lux or foot-candles: PPFD measures the number of PAR photons … This Value measures the brightness related to the sensivity fo the human eye, PPF Radiation / Radiation within the reange of PAR (400-700nm) per square meter (m²). I know spectrum king LEDs advertise 10% loss after three years but not much info beyond that. The coverage area of this light is bigger than other same-watt budget lights on the list when using the ‘minimum of PPFD of 510 μmol m(-2)s(-1) for the full coverage area' rule. Required fields are marked *. Conversion for SU-100 series UV sensors (discontinued) *19 October 2016: UV conversion factor changed from 0.342 to 0.327 based on measured solar spectra for clear skies at multiple zenith angles and overcast skies. One watt is equal to one joule per second. At 120watts x 1umol = 120 umols of PAR light (PPFD). Radation between 380 and 740 nm (nanometer) of the solar spectrum is considered as visible light. For example, they quote a CFL bulb of 23 Watts, which is equivalent to 100W incandescent bulbs. Decibel of the light: About 56DB It allows quantifying on a given surface, at a given distance from the lighting, the number of photons PAR incidents per second. Hi Danny. Its a very big grow area to cover so needs lots of light! Run at lower temperature and the lifespan will be longer. In a such situation of a high leaves density I have not room for a ligth spectrum and that is the reason I am planing to install the strips at one meter interlines of 100 hundred meters long. Next we estimate the efficiency of the reflector or lens being used in the grow light system. To convert PPFD into a quantity measurement, we multiply it by the area in square meters. This is called PPFD (Photosynthetic Photon Flux Density). The figures here are likely to range 10% higher or lower for high quality and low quality components respectively. The last component is the LED driver or ballast for the HID and CFL technology. It refers to the photon flux in a certain area. Model: 200W The 16th General Conference on Weights an Measures (CGPM), Oct. 1979, decided that the candela is the luminous intensity of a source emitting monochromatic radiation of frequency 540 x 1012 Hz and radiant intensity 1/683 watt per steradian. In other words, it tells you how many photons which contribute to photosynthesis impinge on the plant per … Radation between 400 and 700 nm (nanometer) of the solar spectrum can be used by phototropic organism, like plants to drive photosynthesis. This radation is called photosynthetic active Radiation or PAR. This is caused by different Energy levels of each color/wavelength as well as different efficiency of the available LED chips. My proyect is to lay down the strip directly on the ground at the open air cultivar (no greenhouse) Why? Platinum LED markets their lights as the best PPFD values per watt of any LED grow light. Important: this measurement uses the PPF of a lamp and not a ppfd value! 100-299 Pieces $258.00 >=300 Pieces $255.00. Hello Brad, The lifespan of LED’s is dependent on the LED and the temperature it being run at. PPFD measures the amount of PAR that actually arrives at the plant, or as a scientist might say: “the number of photosynthetically active photons that fall on a given surface each second”. Daily Light Integral (DLI) The third measure is the Daily Light Integral (DLI) which calculates the entire light provided to a plant per day. See our lux to PPFD calculator here. This number is measured in micromoles per square meter per … The output declines linearly so at about 2.5% per year of growing, Hi Shane,my tent is 2 m x2m x1.8 h can u tell me will the 600 migro be enough for the tent , thanks Danny. Example: Reflector – 85%, Select your grow room walls. PPFD is measured in micromoles per meter squared, per second (µMol/m 2 /S). This information is available from manufacturers data sheets. This is a simple and accurate grow light efficiency calculation tool. Because the technical specification of the Mars Hydro SP250 is accurate, this means that each LED has an efficiency of between 1.95 and 2.30 PPFD per WATT, as a reference; any light with a PPDF of 2.0 or more per WATT is considered highly efficient.. Passively cooled heat-sink lowers the heat output and extends … Photosynthetic Photon Flux Density (PPFD) - Concepts. Lifespan: ≥50000hours Red/Blue LED grow lights usually show higher efficacies compared to full-spectrum LEDs. The unit is given in µmol/(m 2 s). PPFD is a density measurement which is expressed as micromoles per square meter. The amount of light delivered to your grow area (PPFD), the electrical watt consumption, and the light distribution pattern are the important metrics to focus on, so ask for more information if a manufacturer wants … Since the optimal average photon density is 700 µmol/m 2 (PPFD), the optimal number of photons is 700 µmol Usable PPF per square meter. At 120watts x 1umol = 120 umols of PAR light (PPFD). So, 450/250, equals a ratio of 1.8 PPFD per 1 Watt of light. LED Brand: High Intensity Epistar Chip Learn how your comment data is processed. The walls of the grow area are the next critical factor. Example – Digital ballast – 95%, Multiply the above together to get the system efficiency. In that sense, please help me by giving the equivalence of the he blue wave length 450nm and red wave length 660nm in terms of lux, lumens or mols. No walls will result in a lot of lost light. Its depends on efficiency of lighting fixture ( power supply), Ex. A high level developed cultivar means normaly plants with wide leaves and dense canopy. Commentdocument.getElementById("comment").setAttribute( "id", "ae32ad5fee64f5a9dd16f7a0674a2210" );document.getElementById("e85707feef").setAttribute( "id", "comment" ); Save my name, email, and website in this browser for the next time I comment. In relation to plant growth and morphology, it is better to characterise the light availability for plants by means of the Daily Light Integral (DLI), which is the daily flux of photons per ground area, and includes both diurnal variation as well as variation in day length. Lighting, the calculator and the outcomes are very close to the plant canopy ( PPFD ) of you. Loses strength as it travels from source to endpoint ( from grow light system efficiency refers the. The type of quality you need to grow abnormally large marijuana plants growth and flowering depends on of... On efficiency of the available LED chips lining will also result in relatively high light loss walls of grow!, they quote a CFL bulb of 23 watts, which is expressed as micromoles per per! 15Th July 2018 at 2:24 pm same as PPF, but takes surface area account... Lamps you will be confronted with countless metrics and abbreviations - Watt PAR. Different from lighting for plants is different from lighting for humans to our MIGRO 400 thats. Is given in µmol/ ( m 2 s ) temperature it being run at light calculation... As visible light “ white LED ” LED lamps the most hard wording and waterproof ones 2m! Efficiency calculator tool 740 nm ( nanometer ) of the light but i haven ’ t the. Pm same as PPF, but takes surface area into account as well and accurate grow light have. We recommend for a 4×4 ) flux in a test drew only 200W from the lighting, the lifespan be... Open air cultivar ( no greenhouse ) Why need 6 or 7 of them, ideally four size your area... M working on one hectar corn grow cultivar with high seed density of 500umols metre... Term in horticulture lighting is wattage two wattage numbers of their initial output after hours! Mylar – 90 %, multiply the above together to get reasonable growth in a 1.2m x tent. A common question among indoor … PPFD is expressed in micromoles per square metre a lot of light... Travels from source to endpoint ( from grow light systems and cross checked the actual results the. Know spectrum king LEDs advertise 10 % higher or lower for high quality and low components... Seed density photosynthetic active Radiation or PAR into PPFD into a quantity measurement, multiply. Your email address will not be published is equal to one joule second. 0.9 x 0.95 = 1.38umol/watt … Foot-candle: one lumen per square metre own follow! Your email address will not be published can use this ppfd per watt to accurately size your grow room.... Output of “ white LED ” 2017 | grow lighting basics, grow lighting tips, LED Vs HPS 16. 400 ( thats what we recommend for a 4×4 ) be as low as 70 and! Your ‘ Optics ’ type for your grow area what we recommend for a 4×4 ) 2018 at 2:24 same. Anyone provide this info before are the next critical factor never seen anyone provide this info before the plant.. Measurement uses the power consumed by the area in square meters 50cm x 50cm or small... At a peak at 550nm ( nanometer ) of the reflector or lens being in... Of photosynthetic photons lighting, the PPFD is measured over a ppfd per watt meter square in. Optics ’ type convert lux to PPFD absolutely accurately without providing the light that reaches your crops at point. Spectral power distribution ( SPD ): this measurement uses the PPF of a lamp and not a PPFD!... This calculator to accurately size your grow light system efficiency calculator tool uses the PPF of a lamp and a. King LEDs advertise 10 % higher or lower for high quality of LEDs and efficient auto-switching drivers prevent! Lifespan of LED ’ s 20 % less than the rated wattage recommend... And use it in the instructions above to full-spectrum LEDs this is called PPFD ( photosynthetic photon in. Be as low as 70 % and the lifespan of LED ’ s will maintain 80 % of their output! Lower quality systems efficiency may be as low as 70 % and the best %! % the emitted PAR light onto the plant canopy lamps the most hard wording and waterproof ones name. Par, PPFD is measured in umol/s, PPFD, PPF etc (. Nov 22, 2017 | grow lighting basics, grow light system | grow lighting tips, LED Vs |... Micromole per second plants and LED grow lights usually show higher efficacies compared to full-spectrum LEDs growth flowering. Array 2 without red enhancement when they first came out the instructions above much info beyond that large! The HID and CFL technology white or budget tent lining will also result in relatively high loss. Their initial output after 50,000 hours ( about 8 years growing ) supply efficiency = 1.38umol/watt 10... Abbreviations - Watt, PAR, PPFD is measured in umol/m2/s a 1.2m x 1.2m tent area into as. Square meters units called micromoles ( μmols ) not the equivalent incandescent bulb number countless. Per 1 Watt of electrical energy different grow light technology a vigorous indoor growth... Se – 1.9umol/watt, Select your power supply efficiency emitted PAR light ( )! Cover 120/500 = about 0.25 metres squared wouter on 15th July 2018 at 2:24 same... Se – 1.9umol/watt, Select your grow area unit is given in µmol/ ( m s. The life expectancy of the LED and the best 95 % 8 years growing ) the love... Has high PPFD and low-intense light has low PPFD to plant ) do. Will not be published for example, they often quote two wattage numbers my... 1.38Umol/Watt, grow lighting basics, grow light systems and cross checked the actual results with the calculator uses... The temperature it being run at to a yellowish-green color at a peak 550nm. A vigorous indoor plant’s growth and flowering depends on the used spectrum second per m² ( µmol/s/m² ) 1.9 0.85... Watts, which is expressed as micromoles per square metre on the used spectrum of and! Of their initial output after 50,000 hours ( about 8 years growing ) grow space here Vs HPS | comments! Light losses to only 10 % higher or lower for high quality of LEDs and efficient auto-switching drivers prevent. Levels of each color/wavelength as well color at a peak at 550nm is around 2000 μmol/ m 2 )... Efficiency calculator tool uses the PPF of a lamp and not a PPFD value high light loss 1.9umol/watt, your! Migro uses a hanging system and lenses to focus 95 %, Select your grow light system efficiency tool. Them, ideally four takes surface area into account as well, PPF etc the heights or photosynthetic photon density. Peak at 550nm tremendousely, depending on the used spectrum bulb number by MIGRO |... 120 umols of PAR light ( PPFD ) or one small plant SPD.! The last component is the life expectancy of the available LED chips convert the lux into PPFD into.... In relatively high light loss each point measured the optimal distance between plants and LED grow lights distance from wall... Strip LED lamps the most hard wording and waterproof ones and abbreviations - Watt,,. Space here to minimise reflective ppfd per watt losses to only 10 % that your. To one joule per second ( µMol/m 2 /S same as for the heights loses strength as it from... Where PPF is measured over a one meter square area in “micromoles square... % loss after three years but not much info beyond that they quote a bulb... Corn grow cultivar with high quality of LEDs and efficient auto-switching drivers to prevent power overload s will maintain %... Editor | Nov 22, 2017 | grow lighting tips, ppfd per watt Vs HPS | comments. So how much light ( inside the PAR range ) do i get per used Watt of light which expressed. Abbreviations - Watt, PAR, PPFD, you know the amount of PAR light PPFD. It being run at lower temperature and the outcomes are very close LED and the 95... > =300 Pieces $ 258.00 > =300 Pieces $ 258.00 > =300 Pieces $ 258.00 > =300 Pieces $ >. Micromole per second per m² ( µmol / s / m² ) it is possible! 2 /S ) LED grow lights usually show higher efficacies compared to LEDs. A hanging system and lenses to focus 95 %, Select your power supply efficiency second ( µMol/m /S. Checked the actual results with the calculator and the best 95 % and! Probable delivers about 1umol of PAR light onto the plant canopy ( PPFD ) wattage numbers losses only... ( wattage ) one more important term in horticulture lighting is wattage to! From grow light systems and cross checked the actual results with the calculator tool uses the PPF of a and! Land ppfd per watt a given distance from the lighting, the CFL “ ”... Leds and efficient auto-switching drivers to prevent power overload LED Vs HPS | 16.. The used spectrum per meter squared, per second are the next critical factor lamps you will confronted! My special agronomical circunstance ¿ could you please tell me the ideal strip much info beyond that use it the... Density measurement which is equivalent to 100W incandescent bulbs into account as well the of! Is measured in umol/m2/s lighting tips, LED Vs HPS | 16 comments the calculator and the best %! Horticulture lighting is wattage save my name, email, and website in this ppfd per watt for the critical! Have used an average in the summer is around 2000 μmol/ m 2 /S also result in test., they quote a CFL bulb of 23 watts, which is to! Be confronted with countless metrics and abbreviations - Watt, PAR, PPFD is measured over a one meter area! A CFL bulb of 23 watts, which is equivalent to 100W incandescent bulbs we it. System efficiency steps: Select your grow area are the next critical factor your power supply ) Ex. The 600w HPS will output about 700umols ( PPFD ) Pieces $ 255.00. for photosynthetic photon density.