Even when there are rules to place lighting spots for indoor lighting, such as the lumens method, we can certainly say the lighting levels depends on each person, what can result annoying for someone, might be comfortable to others.
Since these factors are quite ambiguous, it is necessary a technical classification to have clear concepts about indoor lighting and also understand the diverse factors that can alter this type of lighting.
The main concern about illumination, is the light source or lamp that its being used, domestic use lamps can be divided into categories such as, fluorescence, halogen and compact fluorescent. Being the filament lamps the less used over the past years, due to its lack of luminance and high energy costs.
For work environments fluorescent and low voltage halogen lamps fits the needs perfectly, as the indoor lighting is perfect and cheap as it has to be on pretty much all day.
Other variable that might alter the results of the desired indoor lighting, can be the colors of the walls, for that interior designers use the color rendering index (CRI) which gives the reproduction of a color sample under certain lighting, the higher CRI is, the best color rendering is obtained. there are 3 rendering groups and one special group.
For rendering group number 1 a value greater than or equal 85 gives us a cold look ideal for industry and workshops, for rendering group number 2 a value from 70 to 85 gives a color scale ideal for use in office space and schools, and finally rendering group number 3 gives a index value less than 70 is used in interior marginal environments whose interest lies not excessively color reproduction.
The group S (for special) is only used for very poor environments, and it is not used with frequency.
To give an example of the importance of this imagine a whitish-walled room under incandescent light, which is very rich in the infrared spectrum, it will accentuate the reddish-brown wood furniture and the result is a yellowish tinge.
Keep in mind that in many cases with only renew the indoor lighting can make big changes in the room decorations. Sometimes the difference can be made ​incorporating the ignition switch or intensity dimmer that allows to create different climates with the same lamp.
The indoor lighting may be substantially different depending on the room you want to illuminate. When we think about how to light a room must not forget that you must have a sense of unity with the rest of the house. Organize a general lighting scheme requires to define what role, both aesthetic and practical artificial light meet each of the environments.
The combination of different types of light in the same space (general, spot, ambient or decorative), can also light up independently, allowing decorative interesting resources.
The light should always strive to be generally mild, preventing glare or lack of light necessary to see where we go. The other types of light will come later, highlighting a particular area or distributing other lights in work areas or reading areas.
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