With reference to street-lighting, how do sodium lamps differ from led lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the cas

Question

With reference to street-lighting, how do sodium lamps differ from led lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
2. As street-lights, sodium lamps have longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street-lighting.
Select the correct answer using the code given below:

Accepted Answer

(C) 1 and 3 only

Answer

(A) 3 only

Answer

(B) 2 only

Answer

(D) 1, 2 and 3