In which case artificial lighting is necessary?
A)Where the recommended illumination levels have to be obtained by artificial lighting only.
B)To supplement day lighting when the level of illumination falls below the recommended value.
C)Where visual task may demand a higher level of illumination.
D)all of the above

Question

Quizplus · Accepted Answer

Artificial lighting is necessary in all the mentioned scenarios: to achieve recommended illumination levels that cannot be met by natural light alone, to supplement natural light when it falls below the needed intensity, and to provide adequate lighting for tasks requiring higher levels of illumination.

In Which Case Artificial Lighting Is Necessary