The excessive use of lamps, dirty lighting fixtures and dirty office rooms will reduce satisfactory level of illumination. Every lamp produced has a definite span of life and if the use of lamps is allowed after its expiry period, the light becomes dimmer or the intensity of light is reduced. So a proper replacement policy of light should be made and the replacement of lamp of a particular room should be made at one time so that distribution of light should be uniform. The use of dirty lighting fixture will lead to a considerable wastage in light. So lighting fixtures are to be washed and cleaned at regular interval for the sake of maintaining lighting efficiency. Dirty office rooms will destroy light reflecting quality because in course of time ceilings and walls of office buildings collect dust and dirt. The intensity of light is deteriorated when the wall surface and ceiling surface are dirtier.