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Old 6th June 2014, 09:31 PM   #11
wicked1 is offline wicked1  United States
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I'd throw in a small percentage of red w/ the blue light, and blue w/ the red, to see if the plants were any happier. I need to get some LED's and build a couple red/blue fixtures before fall, to do some experiments.
I've read different plants have different reactions to the red or blue light, too. People on the hot pepper forum say peppers get bushier under red, and tall under blue. That makes things more difficult for a traditional gardener, w/out a monoculture.
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Old 6th June 2014, 10:21 PM   #12
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Don't ignore some of Cree's offerings. They have released high CRI (93+) LED arrays that go down to 2700k and emit far more red than their previous products did. I've used lots of these in standard domestic lighting and the light they put out is indeed a step above standard 80CRI warm white LEDs of the same CCT.

If they like red, these may be more suitable for some plants.

Then there's the MCE and XML packages that also come in colour variants that include a red, green, blue and white emitter all inside one package. Obviously you'd need a more complex driver for them, but once designed you'd get to vary the light spectrum in whatever way you desired when using them.
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