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Old January 25, 2018   #7
Koala Doug
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Join Date: Dec 2017
Location: Detroit
Posts: 688
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I start all my seedlings now using T5 HO 6500k bulbs. They have noticeably shorter internodal lengths than when I used 'cool white' 4100k bulbs.

I also try to keep the tips of the plants about 1 to 1.5 inches from the bulbs.
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