In fact, yes. The illumination spectrum of sodium vapor lamps is very specific -- they emit almost all of their light around 589nm (amber) [1]. You could easily

In fact, yes. The illumination spectrum of sodium vapor lamps is very specific -- they emit almost all of their light around 589nm (amber) [1]. You could easily replace the light from a sodium vapor lamp with an LED lamp outfitted with LEDs manufactured to emit that particular frequency of light. The LEDs themselves are not particularly expensive either. Linked a digikey page with a potential part you could use.[2] 1:https://commons.wikimedia.org/wiki/File:Low-pressure_sodium_lamp_spectrum.svg https://commons.wikimedia.org/wiki/File:Low-pressure_sodium_... 2:https://www.digikey.com/products/en?keywords=XPEBAM-L1-0000-00601CT-ND https://www.digikey.com/products/en?keywords=XPEBAM-L1-0000-...