The improved focus and cutoff of the LEDs should be improve the visual glow dramatically. With the added benefits of energy efficiency, improved roadway lighting, and reduced light trespass. On the other hand, the low pressure sodium is very monochromatic, much more easily filtered from astronomical data.
Hopefully we can help with the Hilo sky glow from the LPS as more of our LED luminaires are deployed.
The improved focus and cutoff of the LEDs should be improve the visual glow dramatically. With the added benefits of energy efficiency, improved roadway lighting, and reduced light trespass. On the other hand, the low pressure sodium is very monochromatic, much more easily filtered from astronomical data.