In article ,
Adam Aglionby wrote:
Astronomers are one group who don`t like LED streetlights, LPS emits on
2 very narrow bands close together, easy to put a notch filter on
telescope and lose all the orange glow, not possible with white LED.

Original sodium was pretty narrow spectrum - but high pressure rather
better. And that is a bit old hat - lots of lighting went HID, before LED.

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*Change is inevitable, except from a vending machine.

Dave Plowman London SW
To e-mail, change noise into sound.