What's the ideal spectrum of light for illuminating in the darkness?

Since eyes are most sensitive to light around 500nm in the dark, you could concentrate the spectrum around that area, and that would indeed work well in, e.g. snowy conditions, but this would be problematic when dealing with spectrally narrow pigments, especially if they are red.
Is there perhaps a golden mean that maximizes both the overlap with eye cones and the various pigments of the world?