An attempt to apply LED in lighting engineering-EEWORLD

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In the 1960s, researchers discovered that diodes can be used as radiation sources and have commercial value. For decades, scientific and technical personnel in major electronic laboratories and electric light sources have actively studied the basic theories of light-emitting diodes (LEDs) in physics and chemistry, and have been committed to improving the light intensity and luminous efficiency of LEDs. Based on the excellent performance of LEDs in energy saving and life, people have high expectations for them and hope to replace ordinary lighting sources such as incandescent lamps and fluorescent lamps as soon as possible. In the late 1990s, with the rapid development of LED technology, the application field has become wider and wider, and has developed to traffic lights, advertising display boards, car taillights, etc. The advent of high-brightness blue and green LEDs has made it possible to produce full-color LED lamps. Although there is still a large gap between LEDs and ordinary lighting sources in terms of luminous efficiency and luminous flux, and the cost is relatively high, it is not possible to fully enter the wide lighting field for the time being. However, many lighting manufacturers at home and abroad have been trying and producing lamps using LEDs as light sources. This type of lamp with a combination of color and brightness changes is mainly aimed at entertainment and some special effects. The luminous flux of multiple light-emitting diodes can produce a variety of colors and light and dark combinations through the programming of the power supply and control part. The following is an introduction to the use of Chroma LED lamps from the British PULSAR company: Chroma LED currently has a total of 8 models and a controller. The controller can be used independently or controlled by any DMX512 light controller. Chroma Light and Chroma Flash are embedded ceiling lamps. Light is a bull's eye lamp type that can be rotated to adjust the angle, and Flash is a downlight type. Chroma Dome, Chroma Crab and Chroma Heart are spotlights. Dome is ceiling or wall mounted; Crab can be installed on the floor; Heart is an LED light source, powered by 24V power supply, controlled by 0-10V analog signal, and can be customized for OEM application. These lamps can be well integrated with various decoration styles in use, especially ceiling lamps, which are relatively hidden and inconspicuous, but the effect is good and amazing when used. They are particularly suitable for multi-functional places. In more serious occasions, they are not lit or projected on the wall with a certain fixed light color. Since the shape of the lamp is consistent with that of ordinary lamps, it will not affect people's vision, and the color of the lamp body can be sprayed according to user requirements. In some lively and light entertainment occasions, the color change or the rhythm of the lights can be adjusted according to the situation on the scene. For example, at a dance party, the change of lights can be controlled according to the rhythm of the music. Diverse functions and strong practicality. The use of this type of lamps is to arrange them on the ceiling against the wall and project them on the wall as a lighting performance area; second, project them on the relief or other crafts on the wall, including the glassware in the wine cabinet, to make light color gradient, and the speed time can be adjusted, and the artistic effect is very outstanding; third, directly project them on the small round table and bar counter in the bar to make local lighting changes or large-area color light changes, which will produce magical effects.
Chroma Panel is a 60cm square flat plate with 132 LEDs. It can be installed on the ceiling or on the wall. It is especially suitable for installation on the ground of entertainment venues such as TV stations, stages, nightclubs, etc. as underground lights, which can give full play to its long life, low energy consumption and uniform light emission. Chroma Strip is a long strip of color mixed LED tube. The shell is waterproof and reaches the IP65 protection level. The length is divided into three specifications: 90cm, 60cm and 30cm. It is especially suitable for use in buildings, such as windows, doorways, arched buildings or building structures to outline lighting.
According to the different encapsulation lenses, the light angle of the lamp tube is divided into 20 degrees and 90 degrees. This design is ingenious and very practical when used. Adjustable light color creates elegant scenery. The architectural lighting project of Shanghai Notary Office has both the style of Roman architecture and the charm of Shanghai Shikumen architecture in the treatment of the top and windows. First of all, we consider that the lamps should not be too exposed, which will affect the visual effect of the building during the day. At night, the lights can show the characteristics of the building, the Roman columns and the arc-shaped decorative outlines of the top windows. Secondly, after field observation, we found that the brightness of the surrounding environment of the building was not high, and it was not appropriate to illuminate the building too brightly. Therefore, combined with the style of the building itself, the overall lighting should be elegant, and the lights can be used to adjust the atmosphere on holidays. In the process of selecting products, Chroma Stripp LED lamps became the product that best met these requirements. Its tubular shape is suitable for installation in trenches without being exposed; three lengths can be flexibly arranged and matched; 90-degree and 20-degree angles can be used for paving and outlining respectively. In normal times, the light used is mainly monochromatic (white light, yellow light); on holidays, the controller can adjust a variety of light colors to create an elegant street landscape.

Keywords：LED Reference address：An attempt to apply LED in lighting engineering

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