| 摘要 |
The invention relates to a light source for generating light having a spectral emittance in at least a part of the range of 380 nm to 780 nm, the light having a spectral power distribution E(λ) as a function of the wavelengthλ, and a general color-rendering index Ra, wherein the ratio of the integral spectral power distribution over a first range of 575 nm≰λ≰650 nm to that of a second range of 380 nm≰λ≰780 nm is given by the relation: and wherein Bb,≰0.15 and Ra≧20. The light generated by the light source has a relatively small disturbing effect on migrating birds, while it still allows acceptable visibility for human beings.
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