Sativied
Well-Known Member
http://www.ledinside.com/products/2016/6/cree_expands_led_portfolio_for_horticulture_lighting
More efficient red to fix the spectrum of your cool white cobs
More importantly:
"For example, a high-bay reference design built using Cree white and photo red LEDs deliver higher average PPF Density than a 1000W double-ended high pressure sodium (HPS) fixture while drawing half the power."
1000W DE HPS Replacement Reference Design
http://www.cree.com/~/media/Files/Cree/LED-Components-and-Modules/XLamp/XLamp-Reference-Designs/HorticultureReferenceDesign.pdf?la=en
Specifically a Gavita even.
See spectral distribution. 4000k + 660nm.
And compare to HPS
And then try to understand this, and that the left side of the blue line goes down when using high blue...
And realize that we grow cannabis under high intensity light compared to many other crops, and that relatively low blue levels at high intensities provides enough absolute blue light to grow normal. Wasting more on <550 is inefficient.
If any of the light designers for cannabis uses the cree reference, please use more red and less white. Or better, use lower color temp and higher cri... see difference in FR. It's a good start but that reference spectrum is not ideal. Although, compared to a 3500k...
Discuss. Lol...
Now where do I find some cheap chinese labor to put one of these together... hey...
More efficient red to fix the spectrum of your cool white cobs
More importantly:
"For example, a high-bay reference design built using Cree white and photo red LEDs deliver higher average PPF Density than a 1000W double-ended high pressure sodium (HPS) fixture while drawing half the power."
1000W DE HPS Replacement Reference Design
http://www.cree.com/~/media/Files/Cree/LED-Components-and-Modules/XLamp/XLamp-Reference-Designs/HorticultureReferenceDesign.pdf?la=en
Specifically a Gavita even.
See spectral distribution. 4000k + 660nm.
And compare to HPS
And then try to understand this, and that the left side of the blue line goes down when using high blue...
And realize that we grow cannabis under high intensity light compared to many other crops, and that relatively low blue levels at high intensities provides enough absolute blue light to grow normal. Wasting more on <550 is inefficient.
If any of the light designers for cannabis uses the cree reference, please use more red and less white. Or better, use lower color temp and higher cri... see difference in FR. It's a good start but that reference spectrum is not ideal. Although, compared to a 3500k...
Discuss. Lol...
Now where do I find some cheap chinese labor to put one of these together... hey...
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