Full spectrum in the 6,000K to 10,000K range are generally considered best for plants AFAIK. Within that color range its really a matter of preference.
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Maybe didn't mean so much, but it meant everything to me. - T. Reznor
I agree with Steve 100%. Actinics provide very little photosynthetically useful radiation and are thus not very good plant bulbs - but they do look cool
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“There is something in the quality of a good translation that can never be captured in the original.”
-William Gibson