NALMCO Certified Apprentice Lighting Technician (CALT) Practice Exam

Why is luminaire cleaning a good idea?

1. Can raise light levels

2. Economizes on labor

3. Both (a) and (b)

4. None of the above

The correct answer is: Can raise light levels

Cleaning luminaires is a beneficial practice primarily because it can raise light levels. Over time, dust, dirt, and other contaminants accumulate on the surfaces of luminaires, which can obstruct the light emitted. When these fixtures are clean, they are more efficient at providing illumination since the light is not hindered by obstructions. This results in a brighter, more effective lighting environment, which can enhance visibility and contribute to safety and productivity. Although economizing on labor is also a potential benefit of maintaining clean luminaires, it is not the primary reason this practice is encouraged. Proper maintenance can help extend the lifespan of lighting systems and potentially reduce the frequency of replacements or repairs, which might lead to savings in labor costs over time. However, the immediate impact and justification for cleaning luminaires focus more significantly on improving light output rather than labor efficiency.