Application of LED lighting in night scene lighting of ancient buildings

The nighttime urban landscape needs to be given another life and atmosphere through lighting equipment and appropriate lighting design. Designers use different lighting design techniques to express the beauty of the structure and appearance of the building, so that it can exude the beauty of modern architectural structural mechanics, and can also express the ancient buildings as antique and full of charm. Ancient buildings are historical relics and cultural resources, and have gone through countless years and the baptism of nature. They are non-renewable, and modern lighting design and implementation can only be achieved under the premise of reliable protection. This puts forward different requirements for the lighting of ancient buildings from general night scene lighting.

At present, high-power high-pressure gas discharge lamps are widely used in urban night scene lighting. Even general small buildings are also widely used, resulting in excessive waste of energy consumption; and often too much light is projected into the night sky, which not only wastes electricity, but also forms light pollution, destroys the natural environment, and cannot reproduce the beauty of architectural art. This also involves ancient buildings. Ancient buildings are exposed to the sun and ultraviolet rays during the day, and they are also exposed to ultraviolet rays from high-pressure gas discharge lamps at night, which accelerates the degree of damage to the surface appearance of ancient buildings. In recent years, LED lighting equipment has developed rapidly, and various professional lamps can better meet the needs of special decorative lighting such as ancient buildings. It not only has the characteristics of small size, low power, and saturated color, but also does not have ultraviolet light. The appearance of the lamp will not affect the overall appearance of the building during the day, and will not cause ultraviolet damage to the building and the night sky at night. It can also embellish the appearance of the building beautifully.

The theoretical life of LED light source can reach 100,000 hours, and the actual application life can reach tens of thousands of hours, with obvious power saving effect. This is the advantage that everyone has always emphasized. However, this advantage cannot be seen in many night scene lighting projects at present. What users see is serious light decay and short life. It breaks down in less than 10,000 hours. This is because the LEDs generally used by everyone are the most commonly used Ф3mm~Ф5mm display LEDs in the electronics industry for indication functions. The luminous intensity can be increased by increasing the current using a simple electronic circuit. However, using LEDs in this way only obtains a short-term high brightness, but loses the life that LEDs should have.

Pinneng Optoelectronics understands the needs of lighting applications and uses internationally advanced LUMILEDS high-power ultra-high brightness LEDs (Superflux series and Lux-eon series). Whether it is light output, light decay value, life span or driver circuit, it is incomparable to traditional LEDs.

Even with good LEDs, it still doesn't work. The circuit design of the driver and the light board is also very important. In response to these, Pinneng Optoelectronics has developed a series of "constant voltage and constant current control" electronic circuits. Using high-tech integrated circuit technology, the input current of each LED is controlled at the optimal current value, so that the LED can obtain a stable current and produce the highest output luminous flux. At the same time, the LED life can reach 100,000 hours and still have 70% light output.

Heat dissipation is also very important for LEDs. It affects the light output and life of LEDs. In response to this problem, Pinneng Optoelectronics has also developed a series of MCPCBLED products with heat sinks; at the same time, with the application of thermal conductive adhesive materials. After the glue is filled, the LED products have good heat dissipation and better waterproof properties. Even if they are placed in water, they will not short-circuit and break. If any electrical appliance enters water, it will cause a short circuit in the circuit and damage the appliance, and the same is true for LEDs. If the positive and negative poles of the LED are flooded, or the circuit driving the LED is flooded, the life of the LED will be affected quickly. Pinneng Optoelectronics has a good solution to the problem of LED waterproofing and has a number of waterproof patents. Pinneng Optoelectronics has developed an ancient building LED floodlight specifically for the characteristics of ancient buildings, using LumiLEDs1W high-power ultra-high brightness LEDs. It is simple and diverse to install, with novel and exquisite styles. It can not only meet the lighting brightness requirements, but also because it is small, the light source is basically invisible during the day. Therefore, it will not destroy the beauty of the ancient building during the day. This product has been applied to Xi'an, Tengchong County, Yunnan, and Heshun Overseas Chinese Township and has achieved great success, and has won praise from lighting designers and owners.

After establishing a branch in Shanghai in 2003, Pinneng Optoelectronics launched a series of LED lighting products, which promoted the progress of China's semiconductor lighting; at the same time, it also brought a series of overall solutions for ancient building lighting. I hope that in the near future, more and more ancient Chinese buildings will show their more charming charm against the backdrop of ultra-high brightness LEDs.