What is photometric analysis used for in lighting design?

Photometric analysis is primarily employed to evaluate light levels and distribution within a specific space, making it essential for effective lighting design. This analysis involves measuring various aspects of light, including intensity, distribution, and luminous efficacy, which provides critical insights into how well a space is illuminated and how light interacts with surfaces and objects. By understanding these parameters, designers can ensure that the lighting meets the intended aesthetic and functional requirements, maintaining proper visibility and comfort for occupants. This scientific approach helps in creating optimal lighting environments tailored to specific activities and spaces, such as offices, classrooms, or galleries.

The other options relate to important aspects of lighting design but do not directly represent the primary purpose of photometric analysis. Designing energy-efficient systems involves considering various factors like fixture types and control strategies, while determining the cost of lighting fixtures and calculating fixture lifespan are more focused on economic and practical considerations rather than evaluating light distribution and intensity.