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Are low K temp tubes really needed?
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Posted by keepitlow 6/7 (My Page) on Thu, Oct 15, 09 at 16:07
| I was told to have the entire spectrum of warm and cool K temp bulbs in my grow rack. So, I'm using 1 - 6500K and 1 - 3000K florescent tube in each fixture. My sprouts seem to be bending towards the 6500K tubes.
I wonder if the 3000K tubes are really necessary and I should be going with all 6500K tubes? |
Follow-Up Postings:
RE: Are low K temp tubes really needed?
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RE: Are low K temp tubes really needed?
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| I've had good results with 5000k T12 tubes when new but have to supplement with lower 3000-4100k as they age. I'm almost positive this is because the phosphors in the far red degrade quickly in the 5000k tubes. I'm also getting good results with 4100k T5s. This may be due to the higher amount of lumens T5s put out. The reason your seedlings are leaning may be due to the 6500k tubes putting out more lumens than the 3000k. I will continue to run a combination of both at 3/1-5000/3000. |
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