Read this thread:
Basically no single light bulb is the best for both plants and the human eye. But it you really don't have to provide the perfect spectrum for the plants. In the old days we grew plants with incandescent bulbs which had never heard of the phrase "blue part of the spectrum".
I personally love the color of the Giesemann Midday bulbs. They do grow plants very, very well. I was pretty shocked to learn that the spectrum is pretty far from what is best for the plants.