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Re: [APD] Re:Re: Minimum Light Threshold..
Fwiw, I'm running 7 watts fluorescent a few inches above a
3/4 gallon tank and the tank does not behave like it has 9+
wpg. A good portion of the light shines past the tank and,
I suspect, less in reflected back to the plants than in a
--- Robert H <robertph3 at comcast_net> wrote:
> We mostly
> > agree that 4 wpg on a larger tank is a lot of light.
> > if you take a
> > gallon of water and a 4 watt light you can't grow
> > Why not? You
> > have 4 wpg. True, but you have not met the MLT for the
> > plants. I see it
> > all the time in my terrestrial garden.
> Your example fails here and in the other forum because
> you seem to think the
> watts per gallon rule applies to incadescent light bulbs.
> I presume you are
> not talking about a four watt flourescent. A flourescent
> light is several
> times more intense than an incadescent. That is why a 13
> watt screw in PC
> takes the place of a 75 watt incadescent. 2 to 3 watts
> of flourescent light
> per gallon of water over a ten gallon tank is more than
> enough to grow just
> about anything. A ten gallon tank is very shallow.
> Explain to me why a ten
> gallon tank would need more intensive light than a 20
> gallon tall tank.
> Robert Hudson
> 90 day guarantee on plants!!
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