Calculation of illumination of the room

Light in our house not only influences health of our eyes, but also stimulates work of the brain, promoting good rest and mood. For this reason it is necessary to calculate correctly room illumination correctly to choose lamps, to pick up the necessary power of lamps.

Схема расположения контрольных точек при измерении минимальной освещенности помещения

The scheme of the arrangement of control points at measurement of the minimum illumination of the room.

For approximate calculation of power of lamps it is possible to use the formula: P=pS/N, p here – power density on illumination of W/sq.m ( 20 W/sq.m usually undertake - it is the average value), S – the area of the calculated room in sq.m, and N – the number of lamps. However, similar calculation will yield most likely very approximate result. Requirements to the illumination of rooms can be different, depending on type of the room (e.g. in the toilet or the corridor of light it is necessary less, than, we will tell in the drawing room). Besides, lamps depending on type also give different amount of light (e.g. halogen and luminescent lamps).

Таблица расчета удельной мощности на освещение

The table of calculation of power density on lighting.

More precisely to calculate the illumination of any room, applying the formula P = pS/N, size p has to have not mean value (20 W/sq.m), and to correspond to value of power density on lighting for this purpose like the room. Here the table of calculation of power density on lighting depending on type of the room and type of lamps:

Lighting of rooms can be the general – the basic (it, usually chandeliers, suspension) and local (the sconce, floor lamps, in certain cases "tochechnik" etc.). And when it is necessary to calculate room illumination, independently whether you make calculations of the basic or spot lighting it is necessary to consider that different lamps and lamps in view of the design, execution give different luminous fluxes, intensity, brightness.

For the main lighting it is better to use, chandeliers, ceiling lamps having plafonds from opaque or opal glass or the lamp with opaque glass. Light in them, passing through opaque glass becomes soft, scattered. Such light source is capable to light all room with the uniform, diffused light.

The converse effect will give use of the lamps having catopters or uses in such lamps of lamps with the catopter. The reflecting layer in them is put directly on the lamp flask, is closer to the socle. Such light should be used for illumination of the certain room space.

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