NCIDQ IDFX Practice Exam

Question: 1 / 590

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

Short lifespan

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.

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Low brightness

Requires no ballast

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