Effects of Lighting Quality on Working Efficiency of Workers in Office Building in Tanzania

Figure 2

The perceived influence of lighting environment on occupants’ health. (A) Insomnia. (B) Back pain. (C) Neck pain. (D) Shoulder pain. (E) Tiredness. (F) Sleepiness. (G) Teary eyes. (H) Headache. (I) Eyestrain. (J) Eye fatigue. (K) Stress.