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03-11-2005, 07:36 AM
| #1 | ||
| Novice Gardener Join Date: Feb 2005
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moving towards my sixth week from seedling, blueberry. 400w ml and will be switching to hps in about a month. as of now, my light is vented and cool to the touch. my light is about 2 inches from the biggest plant. however, my biggest plant is much bigger then the rest, hogging all the light. should i move the light up, or down? also, how much distance should i have my light when i change to the HPS? Thanks | ||
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03-11-2005, 07:59 AM
| #2 | ||
| Banned Join Date: Dec 2004
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 | w/o a cool tube u should be 12-18 inches away w/a cool tube u could get 6-8 inches away the heat could stress your ladies if i were u i would move the light up a little bit . or add a fan to blow air across the tops of the plants and bottom of the bulb but beware heat issues will cause leaves to turn yellow and dry out | ||
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03-11-2005, 08:26 AM
| #4 | ||
| Novice Gardener Join Date: Feb 2005
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fan vent connected to both sides of the light. so how hi should i have the light in the veg faze and in the flowering faze? i do have some drying and yellowing but its at the bottom of the plants!? what do you think that is from? | ||
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03-11-2005, 08:56 AM
| #6 | ||
| Gardener  Join Date: Nov 2004 Location: Blending in to gen pop
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 | Well, if you can't put some blocks of wood or something under your shorter plants, maybe you can bend your tall one over? The idea is to get all the tops of the plants at the same level, so they all get good light. | ||
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03-11-2005, 09:02 AM
| #7 | ||
| Grand Master Gardener   Join Date: Jun 2004 Location: In Transigent
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| Train the tall plant(s) down to the level of the short plants to maintain an even canopy. You should be able to keep a 400w with no glass or cool tube about 8" from the tops of the plants, and a lot closer with a cool tube. Set up a small oscillating fan to blow in betwen the lamp and the plants. Hold your hand palm down at the top of the canopy, if you can hold it there without discomfort for a minute then the plants should not heat stress.  penguin | ||
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03-11-2005, 09:14 AM
| #8 | ||
| Cultivator Extraordinair  Join Date: Jul 2004 Location: Bright Lights, Big City
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| Penguin says what I was always taught...If you can keep your hand there then you are probably OK.A fan across the tops is also an excellant idea. Penguin does know his stuff.If it was me I would listen to what he says.................if its possible 
__________________ Any plants referred to, by me Pearl, including, but not limited to, as having been grown, in need of help for, in search of advice for, or shown off to the world wide web with pride and joy, are entirely fictional. | ||
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