Until recently, the lack of light intensity in LEDs was a limiting factor for many gardeners and greenhouse growers indoors. What do they all mean, and why should you care? You can then work out the ratio of PPFD per watt by taking these two values and doing some simple math. a 2m x 2m tent is 4m2 total area. This guide gives an estimate for converting Lux to PPFD. Intense light has high PPFD and low-intense light has low PPFD. See our lux to PPFD calculator here. Flowering, Fruits 400 PPFD to 800 PPFD. Photosynthetically active radiation, often abbreviated PAR, designates the spectral range (wave band) of solar radiation from 400 to 700 nanometers that photosynthetic organisms are able to use in the process of photosynthesis.This spectral region corresponds more or less with the range of light visible to the human eye. To understand the efficacy of a grow light, we simply divide one by the other – i.e. Reply. The new multiplier was derived from spectral data, but corresponds to the energy content of photons at 366 nm. For example, full sunlight is 2000 µmol m-2 s-1 or 108,000 Lux (2000 ∗ 54). Two LED Habitat 420 Flower Lights, which provide an average ppfd of 995 ?mol using just 160 watts each. It is obvious that this value is exceeded in the center but in the border area the PPFD values are dramatically lower. Thats about 50cm x 50cm or one small plant. Fluence Spydrx PPFD/Watt:2.17 (330w @$900.00) $2.7/watt Bios Icarus Ti2 PPFD/Watt 2.17 (702w @1325.00) $1.88/watt Chilled logic v2 PPFD/Watt:2.16 (104w @$120.00) $1.15/watt Mammoth 10 bar PPFD/Watt:2.12 (800w @$1,069.00) $1.33/watt Mars SP 3000 PPFD/Watt:2.1 (300w @$400.00) $1.3/watt Optic 1 Cob PPFD/Watt:2.04 (54w @$129.00) $2.38/watt This calculator converts foot-candles to Photosynthetic Photon Flux (PPF), a measure of Photosynthetically Active Radiation (PAR). Understanding The Numbers. Plant response may vary due to plant types and environmental conditions. . Plant response may vary due to plant types and environmental conditions. We recommend back correcting data when possible. By using a simple watts per square footage principle, you can quickly estimate how much LED light is needed to create ideal growing conditions for your plants. Two CMH's in a 4x4 would probably be devastatingly good, or two reflector 192's. Conversion – PPFD to Watts NOTE: This conversion is for UV light in sunlight *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. Watts, PPF, PPFD, PAR and DLI. PPFD. Reply. *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. Calculate how many BTU's will be needed to cool your lights, remember Horticulture Lighting Group engines run ~60% cooler than their HPS replacement. Watts to lux calculation with area in square feet. A calculator for converting footcandles to PPF and PPF PAR Watts for common light sources. Flowering with Supplement CO2 600 PPFD to 1100 PPFD *Chart is for reference only. Most lighting companies quote PPF per Watt and do not publish PPFD per Watt. Growing indoors with aeroponics using HLG LED Grow Lights, is more efficient than traditional farming methods and a solution to sustainable food production. Obviously, PPFD measurements in a tent with the light two feet above the canopy are going to be drastically different than in a warehouse with 20-foot ceilings. When cultivating e.g. The converted PPFD data will be accurate if the entered Lux data is accurate. 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