Question

Low pressure sodium vapor lamps have the following disadvantage compared to high pressure sodium vapor lamps

• A. Costly
• B. Poor color rendering
• C. Inefficient
• D. Can only be used for indoor applications

Hint:

Low-pressure sodium lamps are efficient but produce poor color rendering, making them less suitable for color-sensitive applications.

Answer 1

The Correct Option is B

Low-pressure sodium vapor lamps are known for their efficiency and long lifespan but have poor color rendering capabilities. They emit a monochromatic yellow light, which makes them unsuitable for applications requiring accurate color differentiation.
High-pressure sodium vapor lamps, on the other hand, provide better color rendering and are often preferred for outdoor lighting, street lighting, and applications requiring more natural light tones.
The poor color rendering is the primary disadvantage of low-pressure sodium vapor lamps compared to their high-pressure counterparts.