Which of the following factors is essential for improving comfort in lighting design?

Improving comfort in lighting design fundamentally revolves around the visual experience of individuals in a space. Minimizing glare and eye strain is essential because these two factors directly affect how comfortably people can perform tasks and move about in an environment. Glare can cause discomfort and reduce visibility, making it hard for individuals to focus, while eye strain can lead to fatigue and reduced productivity.

Effective lighting design aims to create environments that enhance well-being and support various activities, whether it's reading, working, or relaxing. Therefore, ensuring that lighting is positioned and diffused in such a way that it does not create harsh spots or reflections contributes significantly to a comfortable atmosphere. In essence, by addressing glare and managing light exposure, a space becomes more inviting and functional, promoting higher levels of comfort.

The other choices, while potentially relevant to different aspects of lighting design, do not specifically target the comfort derived from the visual experience. For example, high-intensity lighting might be suitable for certain applications but can lead to discomfort if not controlled properly. Efficient energy use is crucial for sustainability and cost-effectiveness but doesn't inherently improve comfort. The maximal use of color filters might be artistic and create a unique atmosphere but does not address the fundamental comfort issues associated with glare and eye strain.