LIGHTING AND POWER-PHYSICAL PLANNING OF LIBRARY-LIBRARY MANAGEMENT
The main activity in a library is reading for which adequate lighting is essential. Poor light strains the eyes and causes fatigue. On the other hand, glare is equally strenuous, and direct sunlight on the books is positively harmful. While maximum advantage should be taken of natural sunlight (electricity is costly and not hundred percent dependable in our country), and it should be judiciously supplemented with artificial light. Glare of the sun inside the building should be avoided, so also shadows cast by artificial lighting particularly in the reading and service areas. There are certain areas where subdues lighting is preferable (e.g., micrographics section), and they may be suitably located. It is not only the quantity of light that is important, but also the quality of light, and a judicious choice has to be made to blend and complement natural light and artificial light. In critical areas, provision has to be made for emergency lighting specially if the library activity is carried out after daylight hours.
Some important tips in this respect are:
The visual task (book): Immediate surrounding (table):
Background (wall) = 10: 3: 1
Reading Room 200-400 350 19 Reading Tables Lending & 400 700 22 Staff Areas Reference & 600 16 other Services