Recommended illumination suggested by Illuminating Engineer Society for general office work:: (A) 100 lux, (B) 400 lux, (C) 900 lux, (D) 2500 lux
Answer is B. Visual task Illumination (lux) Casual reading 100 General office work 400 Fine assembly 900 Watch making 2500 Ref: Park 21st edition, page 684. Chapter: Environment and health.