There are numerous references at the International Dark Sky Association website:
http://www.darksky.org/
The two cities I have read about were in AZ. The council decided to change out from old style lights to better efficiency and went for the whiter blue light spectrum in the 5500k plus. There were numerous complaints from residents. Studies have been done with animals and how the higher spectrum light affects their circadian rhythm and human trials may or may not be indicated. The glare is the main complaint and the rest of the evidence started falling in to place once studies were ordered with how the spectrum affects human eye dilation and etc.
Anyway, the evidence was enough that both city councils abandoned the brighter spectrum while still going to the higher efficiency lighting. Since slightly less power is used for the lower spectrum the initial cost expenditure was amortized over the life of the bulb with little to no affect on the city budget.
Much of the IDSA deals with astronomy preservation, but the light spectrum and commercial use of LED should be concerning to all of us.
I have all LED in my house, all under 3000k, and I haven't met anyone that could tell me they weren't incandescent. So, although I have the higher kelvin lights on my ST, it isn't my normal preference and if some lower kelvin bulbs become available, I will probably trade them out.
However, interesting point number 5,982 (or so), I have been told that the blue white bulbs of the clear lens makes the yellow bulbs of the stock light look wrong. One is either too white or the other is too yellow. I kind of liked that. If I look different, or if I look weird, or if someone is going to take the time to comment on it, I have to figure that it worked and they noticed. I might just leave it instead of upgrading the headlights as well.
Although, I don't know if my OCD will allow me to... ST Gui's looks so dang good all converted over!!!