permaculture

["Thomas Paul Jahn" <tpj@life.ku.dk>]

It must a lot dependent on what plant species or even variety you are going 
to grow. If you think hemp, you may be better of in another forum. :-) 
But I guess you want to grow different species. And then it will be very 
difficult to achieve a stocky growth at a certain light intensity.
I guess the answer to this question will be a biological rather than a 
technical.



>>> Amy Little  28-03-10 22:57 >>>
This is a 250 watt total lighting older bulb with good reflector. I 
figure it will cover 3x3, depending on how close
I am concerned that the light may be too close and harm the plants, 
but I like the stocky growth.
How close is close enough?

At 03:40 PM 3/28/2010, you wrote:
>You didn't really give enough information for anyone to be able to
>answer the question. What is the bulb wattage? Is this supplemental
>lighting or the total lighting? Is is a new bulb or an old bulb? Are you
>using a reflector?
>
>A 1000 watt metal halide with a reflector will light an 8' x 8' area as
>the only light source. If it is supplemental lighting, you could light a
>10' x 10' area. So try 4 - 5 feet above the crop for a 1000-watt. I've
>never used a 400 watt.
>
>
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