Health Hygiene & Sanitation

Lesson 16 : Lighting And Noise

Suggestion For Improving Daylight Illumination

• Orientation of buildings


• Should be facing north or south, for uniform illumination and to avoid undue heating of rooms from sunlight
• If this cannot be done, then window shading can be used to reduce the entry of heat from sunlight


• Removal of obstructions either partially or wholly


1. Windows


• Should be properly planned
• Natural lighting depends on amount of visible sky, size shape, and arrangement of windows
• Tall window gives greater penetration of light
• Wide window gives greater diffusion of light
• Area of window should be proportionate to the purpose for which it is used.


2. Interior of the room


• Ceilings should be white
• Upper portion of the wall should be light tinted and lower dark tinted
• Desirable reflection factor from
• Roof is 80%
• Walls is 50 – 60%
• Furniture 30 – 40%
• Floor not more than 20%