The factors to be considered for correct illumination are.
a. Nature of work.
b. Determine the foot-candle illumination required after studying the nature of work. Example for precision work – 100 foot-candle, for fine engraving – 50 foot-candle, for reading, typing, drawing, fine machine works 25 foot-candle etc.
c. Design of apartment using for the proper projection of illumination for better work or purpose.
