Spotlights are typical modern lights with no main light and an unlimited scale, which can create an indoor lighting atmosphere. If a row of small spotlights are combined, the light can be changed into a wonderful pattern. Because the small spotlights can freely change the angle, the effect of combined lighting is also ever-changing. The spotlight is soft and can also be used for local lighting to add to the atmosphere. If you want to use LED spotlights better, what issues need to be paid attention to? Below, I will discuss the knowledge about LED spotlights with everyone. (1) Common knowledge of buying LED spotlights Spotlights can be divided into PAR16, PAR20, PAR30, and PAR38 according to the size of the light output surface. Common lamp bases are GU10, E27, E14, etc. These spotlights are powered by 85 ~ 265VAC. In addition, there is a MR16 spotlight, the lamp head is GU5.3, which is powered by 12VAC, and there is an electronic transformer or power frequency transformer at the front end to convert the commercial power 22OVAC to 12VAC. The angle of the spotlight is generally below 65 °, which is mainly used for local lighting, accent lighting and other occasions. The LED spotlight angles of various manufacturers are mostly concentrated in the ranges of 12 °, 24 °, and 36 °. According to the "GB 50034-2004 Architectural Lighting Design Standards", the color temperature of indoor lighting sources can be divided into three groups, less than 3300K for warm colors, suitable for guest rooms, bedrooms, wards, bars, restaurants; 3300K ~ 5300K for intermediate colors, suitable for offices , Classrooms, reading rooms, clinics, inspection rooms, machining workshops, instrument assembly; greater than 5300K is cold color, suitable for hot processing workshops, high-illumination places [1]. At present, the relevant international and domestic standards basically refer to "ANSI C78.377", and the color temperature is divided into 2700K, 3000K, 3500K, 4000K, 4500K, 5000K, 5700K, 6500K grades. . Figure 1: LED color temperature and color tolerance range Therefore, LED spotlights are usually classified according to this color temperature. However, LED spotlights are mainly used for indoor lighting, and the color temperature is mainly concentrated in the 2700K, 3000K, 4000K and 5700K grades. According to the "GB 50034-2004 Architectural Lighting Design Standard", the color rendering index (Ra) of the lighting source should not be less than 80 in rooms or places where you work or stay for a long time. In an industrial building where the lamp installation height is greater than 6m, Ra can be lower than 80, but it must be able to distinguish the safety color. LED spotlights need to think about interface standardization When purchasing LED spotlights, you need to read the manual or packaging instructions provided by the manufacturer to determine the power supply voltage and related parameters of the product, including luminous flux, color temperature, power, color rendering index, angle, etc. In indoor lighting, when purchasing LED spotlights, first of all, we must determine whether to use the direct power supply of the city power or the power supply after the conversion of the transformer, in order to choose whether to buy MR16 or other spotlights; Light output size; Then you need to confirm the angle range of the spotlight you need; Finally, according to the above "GB 50034-2004 Architectural Lighting Design Standard" requirements, according to the occasion of use to confirm the color temperature and color rendering index to achieve the desired lighting effect. If you do not understand the parameters of the lamp, you can check the equivalent label on the package to see how much power is equivalent to the traditional lamp, so as to choose. Due to the unevenness of existing LED spotlights of various manufacturers, many manufacturers do not completely design the spotlight shape according to IEC 60630 in order to solve the problem of heat dissipation and power supply space. Spotlights are sometimes used as the light source of some lamps, so it needs to be clear Whether the LED spotlight can be installed in the lamp. If it cannot be installed, it is necessary to purchase a matching lamp housing and replace it in one piece. For the MR16 spotlight, because there is an electronic transformer or power frequency transformer at the front end, when purchasing the MR16, you need to confirm whether it is compatible with the transformer. If it is not compatible, it will flash or not light. For thyristor dimming spotlights, the compatibility of lamps and dimmers also needs to be considered, otherwise the lamp will flicker or cannot be dimmed during dimming. (2) Thinking about the development direction of LED spotlights and the standardization of their specifications and interfaces At present, LED spotlights are mainly used to replace traditional tungsten halogen spotlights. Due to the limitations of their shape, base and installation requirements, the design of LED spotlights faces many difficulties. Within the standard size range of existing spotlights, it is difficult to achieve high power and high luminous flux for an LED spotlight. At the same time, it also faces many difficulties in light distribution, heat dissipation, electrical safety, etc. Such characteristics are not conducive to the healthy development of LED lighting. LED is a new type of light source. LED spotlight is one of the earliest application products that can reflect the characteristics of LED. According to the characteristics of LED, a new set of LED spotlight specification interface standards should be formulated. It regulates the LED spotlight's external dimensions, modular blocks, parameter bins, standard interfaces, etc. to achieve the modularity and interchangeability of LEDs, thereby promoting the healthy development of LED lighting. At present, the international ZHAGA alliance, which has attracted hundreds of manufacturers and industry related companies from the United States, Asia and Europe, has begun to develop LED lamp specifications interface standards. It is committed to strengthening the compatibility of LED modules and their controls in terms of machinery, testing, and parameters. Relevant technical specifications have been published, and some have been revised many times. In China, Jiuzhou Optoelectronics and other enterprises have been led by the National Semiconductor Lighting Engineering R & D and Industry Alliance, and they are also actively carrying out related work. Summary: As LED technology continues to mature and costs continue to decrease, LED spotlights have initially gained popularity and will be widely used in various occasions. However, the development and popularization of LED spotlights still face many problems. How to develop cost-effective LED spotlights; how to solve the heat dissipation problems of high-power and high-luminance LED spotlights; how to realize the modularity and interchangeability of LED spotlights; how to fully reflect the long life, high light efficiency and controllability of LEDs Features, so that people can enjoy colorful lighting, get more affordable, safer and more reliable LED products, also need the joint efforts of various manufacturers and industry professionals. 2.3-24GHz Frequency Synthesizer Modular Synthesizer,Wideband Synthesizer,Dual Frequency Synthesizer,Digital Frequency Synthesizer Chengdu Zysen Technology Co., Ltd. , https://www.zysenmw.com
March 21, 2024