Do they have LEDs now that only put out light in a small spectrum of filterable wavelengths? The city of Tucson for a long time resisted swapping all their stre

Do they have LEDs now that only put out light in a small spectrum of filterable wavelengths? The city of Tucson for a long time resisted swapping all their street lights out from the existing sodium lights because local astronomers found it significantly harder to filter out the wide gamut of "junk light" from LEDs.