Light in the house affects not only health of eyes, but also in a certain way makes impact on work of brain, promoting good rest. Therefore, choosing lamps, selecting the necessary power of lamps, it is necessary to count room illumination correctly.
- - special formula for calculation of power of lighting;
- - data on power density on lighting (p).
1. Use special formula for approximate calculation of power of lighting. It has appearance: P=pS/N where p – the power density on lighting measured in W/sq.m (20 W/sq.m – average value), S – designates the area of the counted room in square meters, N – the number of lamps. However similar calculation is capable to yield approximate result. Requirements to the illumination of various rooms quite different, depending on type of the room (for example, in corridor or toilet of light it is necessary less, than in the living room). Also lamps depending on their type also deliver different amount of light (for example, luminescent and halogen).
2. For more exact calculation of illumination of any room, using formula P = pS/N, consider that size p has to undertake not average value (20 W/sq.m), and according to value of power density on lighting for this purpose like the room. There are special tables with calculations of indicators of power density on lighting considering type of the room and type of lamps. They can be found in the Internet, on the websites devoted to this problem.
3. When calculating power of room illumination take into account that it can be the general – the basic (chandeliers, suspension, etc.) and local (floor lamps, sconce, floor lamps, tochechnik etc.). And when it is necessary to calculate illumination, regardless of whether you make calculations of local or main lighting, it is necessary to consider that various lamps and lamps give different luminous fluxes, brightness, intensity.
4. For the main lighting use chandeliers and surface mounted luminaires which have plafonds from opal or opal glass or lamp with opal glass. Luminous fluxes in them soft, scattered. The similar luminous source can light all room rather evenly.
5. If you want to achieve boomerang effect, use the lamps having the reflecting surfaces or use in such lamps of lamp with the reflecting surface. The reflecting layers in them can be put closer to socle on the flask of lamp. Use such light for lighting of certain square of the apartment.