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Great LED grow lights
Posted by: Black
Date: April 18, 2009 12:42AM
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Re: Great LED grow lights
Posted by: Racer X
Date: April 18, 2009 12:47AM
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Re: Great LED grow lights
Posted by: freeradical
Date: April 18, 2009 12:55AM
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Re: Great LED grow lights
Posted by: Stephanie
Date: April 18, 2009 01:04AM
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Re: Great LED grow lights
Posted by: Black
Date: April 18, 2009 01:07AM
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Quote
freeradical
The general rule of thumb with artificial light, is that for every inch a light source is away from a plant, it must be on for that many hours to provide the light that the sun would provide in a normal day.
For example: If your light source is 19 inches away from your plants, your lights must be on for 19 hours a day.
Re: Great LED grow lights
Posted by: Black
Date: April 18, 2009 01:13AM
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Re: Great LED grow lights
Posted by: freeradical
Date: April 18, 2009 01:28AM
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Quote
Black
Quote
freeradical
The general rule of thumb with artificial light, is that for every inch a light source is away from a plant, it must be on for that many hours to provide the light that the sun would provide in a normal day.
For example: If your light source is 19 inches away from your plants, your lights must be on for 19 hours a day.
Wouldn't that depend a lot on the particular light?
Re: Great LED grow lights
Posted by: freeradical
Date: April 18, 2009 01:33AM
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Black
This one may be radiocative judging by the description:
"it will make your rocks glow!"
[www.ledwholesalers.com]
Re: Great LED grow lights
Posted by: Mike Johnson
Date: April 18, 2009 03:24AM
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Quote
Stephanie
would they emit UV-A or UV-B? If so, these could be really good for reptiles.
Re: Great LED grow lights
Posted by: Wild eep
Date: April 18, 2009 04:07AM
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Re: Great LED grow lights
Posted by: Black
Date: April 18, 2009 06:58AM
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Wild eep
Not sure how you can be pleased without any results yet.
Also there is no substitute for the sun.
A bit late to start seedlings. I started mine 6 weeks ago.
Re: Great LED grow lights
Posted by: billb
Date: April 18, 2009 07:21AM
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Re: Great LED grow lights
Posted by: Filliam H. Muffman
Date: April 18, 2009 10:06AM
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Re: Great LED grow lights
Posted by: Stephanie
Date: April 18, 2009 10:21AM
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Quote
Mike Johnson
No. They're not full spectrum, not even close. They emit light at 465 and 650 nm, and only at those wavelengths. Reptiles need UVB light somewhere around 300nm.
Re: Great LED grow lights
Posted by: Mactel
Date: April 18, 2009 11:08AM
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Re: Great LED grow lights
Posted by: Black
Date: April 18, 2009 12:27PM
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Re: Great LED grow lights
Posted by: Black
Date: April 18, 2009 12:28PM
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Quote
Stephanie
Quote
Mike Johnson
No. They're not full spectrum, not even close. They emit light at 465 and 650 nm, and only at those wavelengths. Reptiles need UVB light somewhere around 300nm.
Thanks. That's kinda what I figured. I don't have a need for UV lights (only keep snakes) but I know several people with lizards.
Re: Great LED grow lights
Posted by: Black
Date: April 18, 2009 12:29PM
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billb
stops the seedlings from growing tall thin and spindly.
some plants (like marigolds ) are less likely to reach for the light
[www.napervillecommunitygardeners.org]
the lights adjust up as the plants grow taller.
interesting lights, though.
even many flourescent tubes on 14 to 16 hours a day can run an electric bill up