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Re: Seeds Under Lights Versus Greenhouse


>Even if you use a so-called "warm" fluorescent tube?  I don't know
>of any incandescent bulbs that fit in a fluorescent ballast (typical
>grow light setup).
>

Plants grow fine under gro-lux and warm whites, they are very good for
general growth. I'm just saying there are cheaper alternatives. You could
have fluorescent battons and a little lamp with a 40w bulb in it to do a
better job. If you are interested in photoperiod extension, you need to
look at the spectral distribution of the light source you are using- you
need peaks at 670-720 nm for this and the best, cheapest source for this is
incandescent bulbs. You only need about 40w/square metre.

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Ian Cummings                             fax: 61 3 62 262698
Plant Science Department                 phone: 61 3 62 262648
University of Tasmania                   email: Ian.Cummings@plant.utas.edu.au
G.P.O. Box 252-55
Hobart, Tasmania
AUSTRALIA 7001
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