Re: Grow lights
- To: pumpkins@mallorn.com
- Subject: Re: Grow lights
- From: P*@aol.com
- Date: Sat, 29 Nov 1997 07:56:13 -0500 (EST)
Chris and rick,
It is important to keep the lights close to the plants....a few inches....
they run cool and will not burn the plant the way a metal halide lights can.
I had a day long interview about 10 years ago with Chris Mpelkas...
Photobiologist for GTE Sylvania in Danvers Ma. ( Now Retired). I don't have
the exact figures in front of me ( I have it written down somewhere) but as I
recall the intensity of the light source is cut by 50% when you increase the
distance from the light to the plant by a foot, in other words, The light
intensity is X when the lights are very close, 50% X at one foot, 25% X at a
two foot distance. So if you have your lights 2 feet away from the plants you
are getting poor quality light. There is nothing like the real sun. Thats why
it is important to get your plants up quick and out in the real sun when they
are a week or less old. There is no gain in letting plants get pot bound and
sitting around in poor quality light.
pumkinguy@aol.com
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