Light spectrum

Hi all, I only recently subscribed to this list (great info) and have a question about flourescent bulbs. I have read that "most" aquarium plants prefer a buld with color temp less than 5300-5400K. But, many people on the list seem to have great success with higher temp, bluer, bulbs. In the past I have used 5500K metal halide which seemed to work well. Do you think that 6500K flourescent bulbs are too blue for most freshwater plants? Or, how about a mix of Chroma50 and Chroma 75?