||In this paper the effect of spectral power distribution SPD
of typical outdoor LED lamps on star visibility index SVI was analyzed.
For those lamps the nearest color temperature CCT [K] and scotopic
efficacy lm/W] data are also provided. The SVI has been defined as a
ratio of its scotopic flux to scotopic flux created by full moon light. The
calculations show that there is a strong relation between CCT of LEDs
and SVI index. Low CCT of the lamps does not significantly affect their
SVI value. Unfortunately, those kind of lamps are less attractive in
applications because of their low .