Number of lumens required for good lighting is calculated by –

Correct option is B

The number of lumens required for good lighting is calculated by multiplying the area of the room (in square feet) by the lumen requirement per square foot. This ensures sufficient lighting for the intended use of the space.

Information Booster: The lumen requirement per square foot depends on the room's purpose:
· Living areas: 10–20 lumens/sq ft
· Workspaces like kitchens or study rooms: 50–70 lumens/sq ft