And I do not mean the 2400-3000K regular LEDs (I see them more and more frequently) but the PCA and NBA (AlInGaP) LEDs, which do not emit blue light at all and have a light color similar to HPS or even LPS.
Here an explanation: http://www.flagstaff...ing-dark-skies/
I have seen these LEDs on one place on a parking lot near a railway station in Holland.
Did anyone see these ? These would be a good lighting source as they do not light pollute more than LPS.