Beijing is China's most important cultural performance market. At present, the traditional light source of tungsten halogen used in stage theaters, film and television lighting, etc. has problems of high efficiency, low energy consumption, high maintenance cost, poor performance environment, etc. If LED lamps are used instead, it will have light effects. High and long life, easy maintenance, rich colors and cold light source, etc., have huge energy saving and emission reduction benefits.
The Beijing Municipal Science and Technology Commission and the Beijing Municipal Bureau of Culture jointly implemented the “Key Technology Research and Application Demonstration of LED Lamps for Stage Theatersâ€. The main task of the project is to overcome the key technologies of high-power LED stage lighting for stage and film theaters, and establish the world's first full-scale LED lighting theater in Beijing Chang'an Grand Theatre to demonstrate the application of LED lighting. At present, the project has completed the preliminary research and development work, and has just completed the LED lighting renovation project of Chang'an Grand Theatre, and is expected to achieve the goal of 80% comprehensive energy conservation. On the evening of September 18th, the world's first Peking Opera performance under the LED stage lighting - "Flower Good Moon Green Life Peking Opera Famous Concert" was grandly staged in Chang'an Grand Theatre. High-power LED stage lighting with brilliant color and digital controllability Excellent color reproduction and comfortable ambient temperature show its unique lighting charm.
High-energy consumption status of traditional lighting in existing literary and art venues
China's lighting power consumption accounts for 10-12% of the country's total power generation. In 2009, China's total power generation was 3,714.65 billion kWh (degrees). According to the national total power generation capacity of 10%, in 2009, China's lighting power consumption reached 371.47 billion kWh, which is 4.39 years of the annual power generation capacity of the Three Gorges hydropower project (84.7 billion kWh). Times around. At present, stage lighting (including stage, theater, TV studio, movie studio, auditorium and other cultural performance venues) is currently a major consumer of lighting, and its power consumption is huge, such as a 90-minute stage performance power consumption It is more than two thousand degrees, which is equivalent to the total power consumption of a five-story office building. There are tens of thousands of venues for theaters, theaters, auditoriums and other cultural events in the country, and the lighting consumption is amazing.
At present, the professional lighting equipment for film and television stage is mostly high-power halogen tungsten light source lamps of 1KW to 18KW. The halogen-tungsten source has low light efficiency, and more than 95% of the power consumption is converted into heat energy, resulting in great waste of energy. The tungsten halogen light source generates huge thermal pollution and infrared radiation during use. The illumination of the actor will produce a strong burning sensation, resulting in a bad working environment and affecting the performance. It is also necessary to invest in a high-load air conditioner to cool down. It causes repeated waste of electric energy and capital; the life of halogen tungsten light source is about 200 hours, which affects the reliability of lighting and increases operating costs. At present, energy-saving fluorescent lamps widely used in offices and homes are difficult to promote in stage film and television venues, and only low-power soft light lamps are used in small studios.
LED light source as the advantage of stage lighting
LED lighting fixtures have obvious advantages in the field of stage film and television lighting. LED lamps are solid-state light-emitting cold light sources, and the infrared radiation is extremely low. The luminous efficiency of the light source is as high as 100 l m/w, which is 4 to 5 times that of the tungsten halogen light source; 50000 hours, more than 200 times that of tungsten halogen light source; no pollution during use, it is the most environmentally friendly and high security light source. LED dimming is directly controlled by DMX signals, eliminating the need for dimming silicon boxes and corresponding cables, reducing investment in dimming systems, cable and cable trays, and power distribution systems. The characteristics of LED lamps in the stage application include: high luminous efficiency combined with improved light utilization, which makes it 90% more energy-saving than traditional tungsten halogen lamps; extremely low infrared radiation significantly improves the use environment; long life makes maintenance costs greatly reduced. The cost of consumables is reduced by more than 90%; the initial construction cost of supporting cables and air conditioners is reduced by 50-70%; the comprehensive energy saving is over 80%.
Bring into play the role of scientific and technological innovation and break through the key technical problems of LED stage lighting
At present, LED has been widely used in landscape lighting, display screens, street lights, traffic indications, etc., but currently LED products are mostly low-power products. As a high-power LED high-end luminaire in the field of professional lighting, there is no precedent for large-scale application. The focus of attention at home and abroad is on the development of film and television stage lighting above 100W. The main key technical difficulties are the heat dissipation technology and optical design of the lamps, such as the traditional theater stage in China, and the color temperature, color rendering index and long distance of LED lamps. Problems such as irradiation pose extremely high demands.
Beijing Science and Technology Plan major projects have concentrated on Beijing Starlight Film and Television Equipment Technology Co., Ltd., Beijing Chang'an Grand Theatre, Beijing Science and Technology Commission Beijing New Materials Development Center, Liangye Lighting, Chinese Academy of Sciences Institute of Physics and Technology and other "production, research and research" superior resources and scientific research results. Through scientific research, Starlight has broken through 400W spotlights, 300W beam lights, 400W color spotlights and other stage lamps. Among them, high-power spotlights have become the world's first LED light source that can be used in stage lighting. The color rendering index is greater than 85, reaching the stage theater. The use of lamps, color rendering, light efficiency, long-distance illumination and other technical indicators have reached the international leading level.
