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Growing Tomatoes

Grow Light Distance Tomatos

11 years ago

I have a grow light with 4 T5 bulbs putting out 8,000 lumens. My plants are about four weeks old and doing great, however I am running out of space. I have always kept the light 2" above plants, but I am considering raising it higher to increase the projected area of light. Should I keep it at 2" or is it safe to raise it higher? Thanks

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Comments (2)

gelatodave
Original Author
11 years ago
*Tomatoes
digdirt2
11 years ago
I have found that with T5 bulbs, given the much greater output, you can get by with a bit more height than with the T12s or T8s. Say 4", maybe 4.5" but I wouldn't push it beyond that and if you note some nodes stretching lower it back down for a period of time.

T12s I run at 1", T8s at 2-2.5", and T5s at 4".

JME

Dave
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