In opinion of many scientists, the emotional, mental and physical condition of the human body relies considerably on intensity and force of lightning in the home or office. Research proves that insufficient intensity of lightning in the workplace reduces serviceability of humans in 1.5 times. However, excessive lightning also is negatively reflected in the physical and psychological condition of humans. Thus, in the interior design of a house or working premise it is necessary to give special attention to planning lightning. Correct planned lightning emphasizes beauty and originality of an interior and also essentially increases serviceability.

There are two basic types of interior lightning: natural and artificial light. Nevertheless, in some cases use the mixed lightning. For example, if there is a lack of natural lightning; wall lights can be applied. Wall lights can be dot, linear or circular. Besides, wall lights can be used for more detailed lightning of some elements of an interior. For example, with the help of dot-wall lights it is possible to allocate decorative elements of an interior, aquarium, sofa or workplace.

When planning lightning it is very important to define the dominating light source. As the basic source it is possible to apply fluorescent lamps, luster or some lamps on perimeter of the premise. According to modern lines of fashion, in area of interior lightning the basic light source from dot-overhead lights can be used and located on the ceiling in a quantity ranging from 10 to 1000 pieces. The quantity of overhead lights depends on the area of the premise and style of an interior. In similar planning lightning there is an opportunity to adjust intensity of lightning due to switching-off of some lights. Some designers suggest having on the ceiling or walls dot lights as figures or abstract images.

Planning lightning is carried out in view of the basic functions of the premise. In premises which are intended for carrying out of parties, night discos or club actions, lightning should be muffled, in view of opportunities color music or carrying out of laser shows.

At restaurants, bars or caf?'s; the most frequent used types of lightning are applied. In the afternoon natural light is used more often. In the evening and at night in the premise two types of lightning can be applied: dominating ceiling light source and small wall or floor lights. Dot wall or floor lights shine a small site of space, creating cozy and intimate atmosphere. The warm color scale plafonds of lights gives special originality to an interior.

At planning lightning in the domestic interior it is necessary to take into account functional purpose of the room. Majority of designers recommend establishing in the house lights with adjustable intensity of lightning. Besides in rooms it is possible to establish some lights: basic lamp on the ceiling and a little of additional desktop or wall lights. Such lights can be of different form or shade; however style and color scale of lights should correspond to the general style of this room.