Green Hornet
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Post by Green Hornet on Nov 10, 2009 11:26:00 GMT
It does and thank you. My next question: I have heard that light filters do not work in plant growth but have searched all over the web looking for a substantive explanation and have found almost nothing about it. Are there intrinsic properties of the light that cannot be altered. Why is that?
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Post by Not a Number on Nov 10, 2009 12:21:08 GMT
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taz6122
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Yesterday is History.Tomorrow is a Mystery and Today is a Gift.Thats why we call it the Present.
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Post by taz6122 on Nov 10, 2009 21:59:28 GMT
That's a great article nan. Filters are made to subtract light and not to change it. If the spectrum is not there to begin with then a filter will not add it. Here's something to add to the confusion. www.thekrib.com/Plants/Tech/light-spectrum.html#0
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Green Hornet
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Post by Green Hornet on Nov 11, 2009 4:09:29 GMT
Whew! Some article, nan. I won't pretend to have understood much of the theory, but the gist is reflected in the tables which could be very useful in determining practical values in commonly found lighting. It didn't directly address the issue with filters but gave a thorough breakdown of useful plant lighting as a whole. Taz, nan, thanks again. This will require more thought and a pot of coffee.
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Post by Not a Number on Nov 11, 2009 15:40:40 GMT
Filters work by blocking, absorbing or scattering certain frequencies while allowing others to pass. No filter is 100% efficient so even a percentage of the frequencies meant to pass through are blocked. A diffusion filter scatters the light. Intrinsic properties of light? I'm not into quantum physics but light is a particle that moves as a wave at a constant speed no matter the medium or relative speeds. When you block light it usually gets converted to infrared (heat). Here's a couple more resources: How does the light produced by different GRO-LUX® lamps affect plant growth? Light and PlantsHow can I evaluate the effect of different light sources on plant growth? Photosynthetically Active Radiation (PAR) Units
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Post by av8tor1 on Nov 12, 2009 15:55:12 GMT
constant speed no matter the medium or relative speeds [/url][/quote] The relative speed and relative time thing hurts my brain really bad... I know, its the whole inverse relationship of time to speed but its still an owie... excellent replies Warren, there is so much incorrect "tribal knowledge" when it comes to light hehehe I gotz a pain in the membrane (string theory joke LOL) Cheers' Av
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taz6122
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Yesterday is History.Tomorrow is a Mystery and Today is a Gift.Thats why we call it the Present.
Posts: 289
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Post by taz6122 on Nov 12, 2009 20:49:16 GMT
Lets not forget the Emerson Enhancement Effect www.ncbi.nlm.nih.gov/pmc/articles/PMC550018/pdf/plntphys00410-0010.pdfLOL The Light and Plants bulletin is calling Coleus a high energy plant I grow lots of Coleus and it needs the least light of all the plants I grow except for Caladium and Alocasia which both will grow in a room with the blinds closed.
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Post by Not a Number on Nov 13, 2009 5:59:05 GMT
LOL The Light and Plants bulletin is calling Coleus a high energy plant I grow lots of Coleus and it needs the least light of all the plants I grow except for Caladium and Alocasia which both will grow in a room with the blinds closed. It depends on the variety. A few such as the "Kong" varieties like partial to full shade. All of the rest do fine full sun to partial shade. A couple will do well in all lighting conditions.
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Post by RL7836 on Dec 11, 2009 20:31:58 GMT
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Post by meadowview on Aug 5, 2010 16:42:59 GMT
Hi Folks:
So.. where do we presently stand on the efficacy of LED lights for CP growing? We're preparing our next electrical upgrade for our greenhouse and that includes under bench lighting for Sarracenia seedling propagation in winter. I was leaning toward T5's but we had a discussion at the office about the utility and efficiency of LED lights for that purpose.
Has anyone successfully used LED lights to raise Sarracenia seedlings? A qualifying factor is that the seedlings are well colored, not weak, green, poorly lit plights.
Sincerely,
Phil Sheridan Meadowview
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Post by ICPS-bob on Aug 5, 2010 21:18:10 GMT
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Post by biglight on Aug 11, 2010 0:16:51 GMT
We've been using Active LED from Ringdale. These fixtures (no bulbs) in our aquarium with several different plants, cactus and various others. We've found that LED lighting is much much better for growing, much cooler, almost no energy, without UV's or Mercury. These lights are designed especially for grow applications for industrial use as well as residential applications. We like their hi bays ( using LED strips) and 90k hours at any kevlin you want, but we like 5500 also 3500 if you like amber color. We've been buying LED fixtures for over 8.5 years now, so we've seen alot of bulb / strip products and know which products are pretty good to use. Let me know if you have any question about the products you want to buy in regards to LED.
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Post by biglight on Aug 11, 2010 0:23:18 GMT
We like active LED from Ringdale. These are real LED's, mft in Georgetown Texas, not Japan or China. 90% less energy than traditional lighting with more luminosity. No brain'er. We consult with the military and grower around the world on the subject. Attachments:
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Post by meadowview on Aug 11, 2010 15:24:48 GMT
Hi BigLight:
I called Ringdale. However, the cost for a 4 foot LED grow light for a non-profit was $679.00!!! How can you afford to buy these for raising CP?
I like the idea of a cool, energy efficient light but ouch!
Best,
Phil
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taz6122
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Yesterday is History.Tomorrow is a Mystery and Today is a Gift.Thats why we call it the Present.
Posts: 289
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Post by taz6122 on Aug 14, 2010 4:34:49 GMT
We like active LED from Ringdale. These are real LED's, mft in Georgetown Texas, not Japan or China. 90% less energy than traditional lighting with more luminosity. No brain'er. We consult with the military and grower around the world on the subject. I would like to know what Carnivorous plants you grow under these lights. At the price it would take me over 10 years of energy savings to pay for these lights. Will they last 20?
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