How do you determine appropriate lighting levels for different spaces (e.g., task vs ambient)?

• A. Use a single fixed lighting level for all spaces
• B. Consider function, occupant age, glare control, and standards (e.g., recommended illuminance levels) and adjust for daylighting
• C. Select lighting solely by color temperature
• D. Use only daylight and no artificial lighting

Answer: (B)

Understanding lighting levels starts with what the space is used for. Different tasks need different amounts of light to see clearly and work comfortably, while the overall ambience should feel balanced and not produce glare. The best approach also considers who is using the space—age can affect how much light is needed for good visibility—along with standards that provide recommended illuminance ranges to guide design. Daylighting should be integrated so natural light helps meet these levels without creating glare or uneven brightness, with controls to keep artificial lighting in harmony with what daylight provides. This combination—function, occupant needs, glare control, established standards, and daylighting integration—explains why this option is the best. A fixed level for all spaces ignores task differences, focusing only on color temperature misses the actual amount of light needed, and daylight alone isn’t reliable in all conditions or times of day.