NCIDQ IDFX Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the NCIDQ IDFX Exam with our interactive quiz. Use flashcards and multiple choice questions with hints and explanations. Boost your confidence now!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the main disadvantage of Ceramic Metal Halide (CMH) lamps?

Short lifespan
Difficulties in dimming
Low brightness
Requires no ballast

The correct answer is: Difficulties in dimming

The main disadvantage of Ceramic Metal Halide (CMH) lamps is their difficulties in dimming. CMH lamps are known for their excellent color rendering and energy efficiency, making them popular in various applications. However, they are not designed to be easily dimmed like some other types of lighting. This limitation can be a significant drawback in settings where variable lighting levels are desired, such as in retail spaces or residential environments where mood lighting is important. The dimming capability of a lighting fixture can greatly affect its versatility and functionality; therefore, the inability to efficiently or effectively dim CMH lamps can restrict their use in certain projects where adjustable lighting is a key requirement. This characteristic distinguishes CMH lamps from more easily dimmable options, thereby impacting design choices for spaces that need fluctuating light levels.