Walking tonight by my house, it struck me that the parks department has started replacing low pressure sodium lights in the lamps with LEDs. You can see the one LED fixture here, compared to the very orange LPS lights elsewhere.
In the other direction, it's all low pressure sodium and incredibly orange.
Are you seeing similar changes in your area(s)? Many of the street lights near me have changed to LED, as well. Is this having a positive effect on surveillance video?
In our tests, LPS lights had significant ill effects on video, turning everything orange/yellow. LED lighting didn't have these issues, aside from overexposure issues due to brighter, and less diffuse, light.