Lighting Control
Possibilities in Cost and Energy-Efficient Lighting Control Techniques
Light Emitting Diodes (LED), which are often referred to as the light source
of the future, are one of the potential replacement of the incandescent lamp.
Based on the semiconductor technology, which has been a hot topic for the
last decades, these lamps have evolved at great speed regarding power consumption, colour saturation and compactness. LED lamps are superior to
conventional lamps in many ways, such as energy efficiency, wide colour
palette and excellent colour saturation but also the fact that they have such
compact dimensions that they can be fitted in almost any structure [40].
More and more producers and suppliers are betting on LED as the light
source of the future. One of them is the European service company YIT, a
leading company in Nordic Countries in the field of Building Systems. According to them it is possible to save up to 15-30% energy by using LED
instead of Fluorescent lamps. However it is not only energy efficiency that
is gained by the use of LED. The quality of the light is close to daylight
and colour rendering is very good and according to YIT, the consumers are
pleased with the LED lighting [9]. Figure 2.1 shows the progressions in
efficiency of the most common types of lamps.