NCIDQ IDFX Practice Exam

Which type of reflector lamp has the narrowest beam spread?

1. Elliptical Reflector Lamp

2. Multifaceted Reflector (MR-16)

3. Fluorescent Lamp

4. Tungsten Halogen Lamp

The correct answer is: Multifaceted Reflector (MR-16)

The multifaceted reflector (MR-16) lamp is known for its narrow beam spread, which is achieved through its design that incorporates multiple facets onto the reflector surface. These facets redirect light into a highly focused beam, making MR-16 lamps suitable for applications where precise lighting is required, such as accent or task lighting in spaces like art galleries or retail displays. The beam spread can be as narrow as 10 degrees, depending on the design and lens used, minimizing light spill and enhancing visual focus on specific objects or areas. Other types of lamps mentioned do not provide the same level of beam control. For instance, elliptical reflector lamps typically have a broader beam spread than MR-16 lamps, designed for more general lighting rather than focused light. Fluorescent lamps have a diffused light output, promoting even illumination rather than narrowly focused beams. Tungsten halogen lamps can offer a range of beam spreads, but they typically do not achieve the same level of narrow focus as MR-16s. Thus, the MR-16's unique construction and optical characteristics make it the clear choice for the narrowest beam spread.