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Re: Is this enough light?

"Roger S. Miller" <rgrmill at rt66_com> wrote:
>>Ivo Busko might have something more to say about this, but I think if you
>>were making your comparison based on PAR rather than lumens you might
>>that the variations are not as great.

>I agree 100%. For the NO bulbs listed in the table at
http://www.aquabotanic.com/lightcompare.htm, lumens/watt span a range of
>about 300%, while PAR/watt only 25%. In other words, different types of
>fluorescent phosphors may look very different to us in terms of perceived
>brightness, while plants don't "see" too much of a difference between then.

Did you actually read what I said? I was comparing lighting systems and not
lamp spectrums. How can there be any any significant variation in PAR
whatsoever if the spectrums are the same?