These procedures will not only cause less waste heat to be released into the air conditioned space but will lower the energy needed to do the cooking itself. Increase use of available daylighting The ideal lighting for any visual activity is natural light. It is best for color rendition, and it is a boost to the attitude and performance of the people within a space. Artificial lighting can only approximate the real thing, and then only a narrow band from the whole spectrum. It is always prudent to make the most of available daylighting, since it is not only the most healthy but also the cheapest light source.
Few offices can get by on daylighting alone.
A common compromise is the use of multiple level switching. The perimeter offices of a building with outside exposures can have some lamps in each fluorescent ceiling fixture on one switch and the balance on another. In large open offices, exterior hallways or classrooms with perimeter daylighting the outermost row of lights can be switched separately, or turned on by a photocell when the daylight is inadequate. The small additional initial installation cost will be compensated many times over by the savings and the occupant's comfort. Older buildings were designed at a time when energy was inexpensive and it was not economical to provide an effective amount of insulation.