The lighting in any given building needs to be designed with three different requirements in mind, and in this order-
Task lighting is that lighting which illuminates the areas where work (tasks) will be performed. This can include desks, counter tops, work benches, factory assembly locations, patient exam rooms, operating rooms, dental chairs, salon hair stations, stages, bars, cooks lines, butcher shop tables, among countless other locations.
Accent lighting is that lighting which illuminates things such as wall hung pictures, floor standing statues, niches, coves, trinket shelves etc.
General lighting is that lighting which illuminates walk ways, general assembly rooms, church seating areas, stairwells, and all the other areas that were not taken care of by task and accent lighting.
Designing your structure's lighting system in this order will cover all of the areas which need illuminating. If you are a home owner and are about to embark on an ambitious remodeling project consider these points before submitting your plans to a contractor for bid. The task lighting in most homes will include the kitchen counter tops, sofa reading areas, garage work benches, bed time reading, bath vanity's, and showers and tubs. These areas will need sufficient light for any tasks to be performed. Kitchen counter tops are known for being dimly lit after a recent remodel because the recessed can light that was supposed to illuminate it is located behind the person standing at the counter top. The person's body is projecting a shadow onto the counter top. These kitchen recessed can lights should be placed just outside of the upper cabinet so they shine light down between the upper cabinet and the person standing there, thus illuminating the counter top. This is displayed in the picture at top.