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Originally Posted by Nexogen
And yes, in my experience red light is more important in the action spectrum of photosynthesis.
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McCree 1972 has the measurement (and frequently used for YPF calculation). blue peak is about 70% of the red peak. Inada 1976 got the similar results. But you should note this is monochromatic response. The data are from crop plants, and there is no example of action spectra from shade plants.
Quote:
Originally Posted by Nexogen
In my opinion, in the picture with 4 COB and orchids need at least 100W 620-660nm Red plus 50W Blue.
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For my plants, it is actually perfect. At the leaf level, I get around 150 micromol/m^2/s. The taller ones get a bit too much. Williams (1983) measured photosynthetic rate of Paph insigne, and it started to saturate around 100 micromol/m^2/s.
Quote:
Originally Posted by Nexogen
[/COLOR]The light is too high. I think you need to use reflector coup and lens[COLOR="Silver"]
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If I put it closer, the leaves start to bleach. Indeed, some of the large Phrags in the back goes too close to the light, and they occasionally have bleached leaves.
The problem of COBs is that they are more of point sources, so they create strong shadow effects. You can see the high contrasts in the photo. So I'm not using the reflector (so the stray light can reach to the lower leaves). Also, in the grow tent, it is surrounded by reflective materials, and I'm growing the plants on the side walls, too.
Quote:
Originally Posted by Nexogen
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Yes, HLG-H-C series is popular because of the high efficiency. With 1050, you should be able to use 5 CX(A/B)3070 to get the max AC/DC efficiency.
So is yours HLG + 4x CXB3070 CRI90 at 1050mA? That is pretty nice.
Hybrid Mode
