ಹಳದಿ ಬೀದಿ ದೀಪಗಳಲ್ಲಿ _________ಅನ್ನು ಬಳಸಲಾಗುತ್ತದೆ.

The yellow street lamps are sodium-vapour lamps, which glow with sodium's characteristic yellow light (589 nm). They are efficient and penetrate fog well.