Re: [APD] Re: Ideal Lights

["S. Hieber" <shieber at yahoo_com>]

Confusing, isn't it. 

Well, don't spend too much time on the details ;-) .
Sunlight has a pretty full spectrum but plants don't use
much of the green part. In fact they tend to be sensitive
in the areas (red, blue) of visible light where humans are
less sensitive. So how light looks to us isn't necessarily
that important for plants. IN fact humans tend to be very
sensitive to the green protion of the spectrum and plants
eschew green light for the most part, reflecting right back
where it came from, so to speak.

Luckily, plants do pretty well with any illumination that
provides a healthy amount of light towards the red (lower
energy) and blue (higher energy) ends of the spectrum and
any quality broad spectrum or triphosphor fluorescent bulb
is going to do that. Older, cheaper single phosphor
fluorescents tended to be heavily towards the green end of
the spectrum and not the best choice for plants. Although,
crank up the watts with those older cheaper bulbs and the
plants still do pretty well.

So long as the bulb is broad spectrum, get what looks nice
to your eyes. The plants will do fine and you'll lkie what
you see. :-)

Scott H.

--- Bill D <billinet at comcast_net> wrote:

> "Intensity matters, spectum is neat irrelevant in my
> experience. Grolux
> supplies lots of red that plants need. Look up at the
> sun, does that look
> blue to you? :-)
> 
> What?
> 
> 
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