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

Most residential users
are less knowledgeable
of technical (qualitative
and quantitative) and
economical aspects concerning (a) real
contribution of lighting for energy
consumption; (b) energy efficiency of lamps;
(c) quality of the obtained lighting. The
general conditions of illumination inside a
room are the result of combining the quality
of the desired lighting with the
photometrical characteristics of the
furnished room (for example, the sizes and
shape of room, the reflectance of the room
surfaces). Among the factors characterizing
room lighting we mention the photometrical
characteristics of luminaires and their setup.
The study realized by the Lighting
Engineering of the Technical University in
Cluj-Napoca in the frame of the CREFEN
research program presents the selection
parameters of a luminaire to be considered
for the residential sector, the thresholds for
the increase of use of energy efficient
lighting in newly built households, the
requirements concerning the integration of
compact fluorescent lamps in the design of
residential luminaires. In the case of the
design of interior lighting installations we
have to consider a series of principles and
methods relevant to energetic efficiency. A
simple software application allows any user
with minimal knowledge of information
technology to design the lighting installation
in his/her own household based on energy
efficiency criteria.
A relatively recent study establishes
that lighting for kitchen, living room,
bathroom and exterior areas consumes
approximately 50% of the total lighting
consumption. 25% of the lamps installed in
households consume 75% of the total
lighting energy. Approximately 20% of
energy is consumed by portable luminaires,
powered through wall outlets.
The analysis of CREFEN program
reply sheets (November 2005) on a total of
290 households has shown that the installed
power for lighting in the analyzed
households has an average value of 853 W -
Figure 10. With an average surface per
home of 37.39 m 2 , (CREFEN - phase report
2005) we obtain an average specific
installed power of 22.81 W/m 2 , with a
preponderant incandescent lighting.
42 Ingineria iluminatului 2009; 11, 1: 35-45
Installed power [W]
1200
1000
800
600
400
200
0
1 room 2 rooms 3 rooms 4 rooms houses
2, 3, 4, >4
rooms
Figure 10 Average installed power for residential
lighting - source CREFEN
5 Lighting education
Our basic activity is to teach one semester
of lighting for 3rd year in Building Services
Faculty. This involves more the basic of
lighting technology and design and a small
lighting project using Dialux. Lighting
education was the first step in preparing
new generations of lighting specialists.
From 1998, LEC launched the six weeks
postgraduate courses in Lighting