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Blog
PPF and Coverage Area Charts for V-Series and L-Series LED Grow Lights.
Posted by William Boune on 25th Jan 2020
Each type of lamp has a defined ability to provide PAR light at different distances off a plant canopy, the beam angle combined with the spectrum efficiency of the lamp determine how much area is effectively covered at a specific value.
PPFD measures the amount of PAR light (photons) that arrive at the plants surface each second. The PPFD is measured at various distances with a Full Spectrum Quantum Sensor, also known as a PAR Meter. Natural sunlight has a PAR value of 900 - 1500 uMol/m2,s when the sun is directly overhead. Essentially PPFD and PPF are the same measurement when taken at the surface of the canopy. Lamps are measured with the PPF standard.
The below charts may be helpful so you can determine just how far off your plants you wish to place each type and power of lamp to achieve the results you seek.
More graphs are forthcoming.
The 8 bar 840 Watt V-Series lamp produces as much or more PPF as the sun does at high noon at 12" off the canopy over a 4' X 4' area. With overlapping beams from adjacent lamps this is enhanced further.
Advantages of Modern LED Grow Lights
Comparison Chart: HPS T5 and LED.There are states where rebates or other financial incentives are available for switching to LED lamps. Visit DSIRE USA just enter your project location zipcode to find a list of incentives for installing energy saving products, you can use filters to narrow the list down to useful links.What are some [...]
What are the Benefits of Grow Lights and How do They Compare?
A brief survey of the benefits and disadvantages of several types of popular Grow Lights.We will look at HID (MH & HPS), Fluorescent, LED, Induction, and Plasma Lighting.HID Grow Lights High Intensity Discharge lamps, commonly referred to as HID generally use MH (Metal Halide), HPS (High Pressure [...]
Measuring Plant Lighting
There are a number of ways to measure indoor plant lighting levels. As such, there remains considerabledebate as to which method provides the gardener with the best information in determining if the light source isproviding the ideal wavelengths and intensities to optimize plant response. While the debate swirls it ultimatelywill always come down to our [...]
Recent News now also functions as a Blog.
Now you can comment on Recent News posted at GrowLightSource.com. Recent News is still posted near the bottom of most pages, on the right.Recent News items are also listed to the right of each article/blog posting.We hope you find this new enhancement beneficial.Start making comments now!
Color Theory - Why Broad Spectrum Makes Sense
Articles by: William BouneCOLOR THEORY: Why Full Color Spectrum makes the most sense.Outdoor Sunlight produces a full but seasonally shifting spectrum of light, during the long summer days when the sun is high overhead the sunlight is of longer duration, greater intensity and contains a higher ratio of Blue light, HID/MH lamps color rendering index [...]
