Assertion: lamp's light | /r/HasProperty | monochromatic yellow
Facets:
Source sentences:
text: Low-pressure sodium lamps are very efficient, up to 180 lumens/W, although the light is a monochromatic yellow
text: They create a monochromatic yellow light.
text: Low-pressure sodium lamps only give monochromatic yellow light and so inhibit color vision at night.
text: Low-pressure sodium lamps only give monochromatic yellow light and so inhibit color vision at night.