On Sun, 23 Nov 2008, Seattle_Aquarist wrote: > comment on 5500k makes sense, the lower spectrum promotes flowering not > growth. Maybe Paul, Erik, and some of our other "plant people" could share > what they think? I thought the spectrum promoting flowering vs. growth was debunked (or the effect was found to be marginal) years ago. In any case, I usually get bulbs that look good to the viewer as opposed to the plants; I prefer 6500K, which is cloest-looking to natural sunlight, and if I can't get 6500K, I get 5000K. - Erik -- Erik Olson erik at thekrib dot com _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member