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  • Build Your Own 3120 Lumen LED Grow Light

    Hello, I too am like you I am learning about this process. What I have learned regarding the human spectrum and plant spectrum is regarding the PAR (Photosynthetically active radiation). Which is about the chlorophylls and carotenoid response to light waves, specifically measured in nm. I have found lots of research that indicates that the light plants need is hardly ever pleasing to people. If I understand it correctly our vision is much more blue and plants are non-flowering plants are red and green with a smattering of blue. Now to make even more confusing you have to worry about light heat temp and light irradiance. The heat part is hopefully obvious but you dont want to bake your plants. Get it bake. hehehe. Anyway, irradiance is the strength of each light wave group from the dist...see more »Hello, I too am like you I am learning about this process. What I have learned regarding the human spectrum and plant spectrum is regarding the PAR (Photosynthetically active radiation). Which is about the chlorophylls and carotenoid response to light waves, specifically measured in nm. I have found lots of research that indicates that the light plants need is hardly ever pleasing to people. If I understand it correctly our vision is much more blue and plants are non-flowering plants are red and green with a smattering of blue. Now to make even more confusing you have to worry about light heat temp and light irradiance. The heat part is hopefully obvious but you dont want to bake your plants. Get it bake. hehehe. Anyway, irradiance is the strength of each light wave group from the distance of the emitter, that says how much of each wave band will be however strong at a specific distance. My research indicates that lumen and watt are more relevant for human sight and less effective for grow lights. I could definitely be wrong but I have read all the research put out by Cornell http://www.greenhouse.cornell.edu/structures/facts... and they clearly say " (Don’t use these units for referring to greenhouse lighting):" Sadly it is next to impossible to carry around a spectrometer to measure light bulbs at Home Depot, and they go out of their way to not break down the light bands even for grow lights.Hope this helps.

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