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11-18-2007, 06:59 AM #21
Senior Member
Whats The Deal Wit These Plants???
Opie.....I'm glad you asked me that question. (
) Allow me to pontificate. :jointsmile: I use a 1kw hps in a cool tube and do have one of those cool little temps guns and have checked surface leaf temps under different conditions. With a good oscillating fan blowing (room temp approx 85 ish) AT the leaves pretty consistently (between light and leaves....maybe 18 inches of space between them) the leaf temps closest to the light usually will stay at about 78-79. That's for older, mature leaves...new growth can be more tender but I haven't ALWAYS found that to be true. Almost ANYTHING can affect that tho imo.....even if the air cooling the light is 10-15 degrees cooler (perhaps its a rainy day or....) will have an effect. Mylar caused HORRIBLE leaf temp and hot spot issues for me ....especially when I got my cool tube vs my old reflector. Some of the things that will affect the leaf surface temps that I have found are DEFINITELY room temp, how hot and how close is your light, and whether you are actively moving air around the plants among other things. I can't say about humidity one way or the other however....mine's pretty much in the 30's always so never see any differences there to judge.
The reason for REALLY wanting to move the air around with a fan and keeping your room temps lower are two important things to me because they directly affect how low I can get my light to the plants. And we ALL know the lower the better there.
Ps Opie: my fave little dogs: chihuahuas, pugs, bostons, papillons, and cairn terriors.
(and mongrels of course!!!)
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\"Your deeds show your character.\"-StinkyAttic
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