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Re: Grow-lights...

Square Foot Gardening List - http://www.flinet.com/~gallus/sqft.html



Diane Streine wrote:

>
> I have grown under lights for only 3 seasons, but have improved my
> system each year.  Being able to adjust the height of the lights is
> important so you can keep the lights about 2 inches above the tallest
> seedlings. <snip>

         My lights are adjustable in height using chains, but I have found
it
much easier to use the type of foam insulation used in house construction.

I set out a flat that has just germinated with, perhaps, 8 sheets of this
foam under it.
As the plants grow I slip the foam out from under the flat .. one sheet at a
time
.. making, thereby, very small adjustments quite easily. My plants are never
as
much as 3inches from the lights.

        The foam is quite easy to cut to whatever size flats you use .. it
is
surprisingly strong, 3/4 of an inch thick,  and it is feather weight. I have
been
reusing my foam sheet/spacers for years. And, if you are lucky, you can get
a
quite good supply for free from the scrap at a construction site.

        I can make small adjustments. Better still, I can vary the height of
each
flat according to its rate of growth. I only use the chains for major
adjustments
from time to time.

Ed Flynn  Md  zone 6/7


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