NALMCO Certified Apprentice Lighting Technician (CALT) Practice Exam

Which factor contributes to a LED lighting system's efficiency?

1. LED lighting systems contain no lead

2. LED lighting is inherently directional resulting in less wasted light

3. Conventional lighting systems cost less to install

4. LED lighting systems are solid state electronic systems

The correct answer is: LED lighting is inherently directional resulting in less wasted light

The efficiency of a LED lighting system is primarily influenced by its inherently directional nature, which leads to less wasted light. Unlike traditional lighting systems that emit light in all directions, LEDs are designed to focus light in a specific direction. This means that more of the light produced is utilized for its intended purpose, reducing the amount of energy lost in the process. The focused design allows for better illumination on surfaces without needing reflectors or diffusers that can absorb some of the light or cause it to scatter. This results in greater efficiency because the energy consumed directly translates into usable light. In contrast, other factors such as the absence of lead or the solid-state characteristics of LEDs, while they contribute to overall safety and durability, do not directly influence the light-emitting efficiency of the system in practical applications.