ingineria iluminatului - Journal of Lighting Engineering - Prof. Florin ...

It must be underlined that the main
factor that influences the selection of an
efficient modern solution, must be the
proper implication of the design team, with
a harmonious balance between the
specialists who design (create) the different
components (architecture – building,
lighting and heating system, automations,
and so on), that leads to the implementation
of the best possible solution.
In order to obtain high efficiency and
reduce the electrical energy consumption
for the interior lighting system of buildings,
regardless of their function (from
residential buildings to constructions
designed for intellectual or physical work,
commercial, cultural, administrative spaces,
and so on), the following conditions must
be met, which are also presented in Figure 3.
1. A modern design of the interior
lighting systems (ILS), based on a balanced
and correct examination of the quantity and
quality criteria that determine the
achievement of a comfortable, functional
and aesthetic luminous environment
(CFALE), which ensures the conditions
required by the specific human activities
that take place in the building according to
its function. Furthermore, the quantity
(level of illuminance and the spatial
distribution of luminous flux) and quality
(distribution of luminance on the visual task
area and in the central and peripheral visual
field, linked with the direction and colour of
light, essential aspects that are often
neglected or mistreated in Romania) criteria
must be harmoniously synchronized (the
schematic structure of the modern design of
interior lighting systems is presented in
Figure 4).
Reducing energy consumption for interior lighting
2. The correct design of lighting systems
based on the international regulations of
CIE, that must be followed by the national
regulations.
3. The exclusive use of last generation
light sources, which have a high quality, a
high luminous efficiency and are produced
by international manufacturers with a long
tradition and a worldwide recognition (new
generation fluorescent and compact
fluorescent lamps, with high efficiency and
long service life – double compared with
regular lamps, mercury vapor lamps and
metal halide lamps. LEDs can also be used
in some cases, depending on the function of
the space, after a correct and professional
assessment of the situation. The colour of
these light sources (neutral white, warm
white, cool white) has to be carefully
chosen according to the type and duration
of the visual task and according to the
access of natural light.
4. The exclusive use of good quality
luminaries, with a high light output ratio
(c>0,9) and an appropriate distribution of
luminous flux, chosen according to the
requirements of the workplace, with limited
direct and reflected glare on the visual tasks
(especially on PC screens).
5. The lighting solution has to take
daylight into account and use it through an
efficient and correct integration into the
interior lighting systems, in such way, that
the two components should permanently
ensure the conditions of visual comfort in
every part of the room. From this point of
view, there are several possibilities,
described below.
Ingineria Iluminatului 2010; 12, 2: 23-31 25