TAILIEUCHUNG - Lighting with Artificial Light 17

Light sources should be as small as possible, produce light efficiently and have a long life. The demands of architects, light planners and operators of lighting installations have formed the basis of the research and development work of the lighting industry. Today more light sources with these properties are on the market than ever before in the history of artificial light. Until now, however, no filament or discharge lamp has combined all three properties. Only light emitting diodes (LEDs), also called light diodes, achieve this. They conform to the lighting designer’s ideal of a pointlike light source: no other lamp. | Fordergemeinschaft Gutes Licht 17 LED - Light from the Light Emitting Diode Contents LEDs are changing the world of light The LED light source LED modules Advantages at a glance Typical applications LED light in use Operational and control equipment LEDs and OLEDs perspectives Legal and normative requirements Standards literature List of illustrations Imprint Fordergemeinschaft Gutes Licht publications 1 2 6 8 9 10 20 22 24 26 27 28 29 1 2 Title Illustration LEDs bring colour into life. The illustration shows the hall of the Weggis Hotel in Lucerne Switzerland. Over 84 000 individual LEDs are distributed on chains over its glass facade. With the aid of a light management system every imaginable colour can be produced from the RGB pattern see also page 15 . 3 LEDs are changing the world of light Light sources should be as small as possible produce light efficiently and have a long life. The demands of architects light planners and operators of lighting installations have formed the basis of the research and development work of the lighting industry. Today more light sources with these properties are on the market than ever before in the history of artificial light. Until now however no filament or discharge lamp has combined all three properties. Only light emitting diodes LEDs also called light diodes achieve this. They conform to the lighting designer s ideal of a pointlike light source no other lamp possesses comparably small dimensions. The miniature form requires small optical systems and creates new demands for light guidance. In the LED the light optical systems are made from synthetic materials with high refractive indices and replace the classic metal reflector. The light gains from LEDs continue to grow doubling about every two years. They have today already exceeded the values attainable by halogen and filament lamps. Soon they will be moving into the yield area of fluorescent lamps. It is not unrealistic to assume that in ten to fifteen years LEDs will .

• Điện - Điện tử
• maintained illuminance
• lighting technology
• luminance
• electrical characteristics
• lighting systems
• Luminaires