The LED market can be described as a mixed bag of fish and dragons. The manufacturers and merchants are pushing hard to push their own products and how to save energy. The designer will listen to him. We have to pick it up, or send a sample, what should I watch? Lamp options include appearance, heat dissipation, light distribution, glare, and installation. The parameters of the light source are: current, power, luminous flux, light decay, light color, color rendering, and the like. Do you really pick a good LED light? Xugong teaches you how to open the fog and gain insight into the LEDs! Let's briefly talk about four parameters that are easily fooled: power, light color, color, and light. power We often say: "How many watts of light do I have?" This habit is to continue the traditional light source of the past. At that time, the lamp could only be selected in several fixed wattages, and it could not be adjusted freely. And the LED drive current is slightly changed, the power will change immediately! Are you still asking for power? Beware! The same LED light source, when driving with too much current, the power is up, but it will cause the light effect to drop, Light decay increases. In general, redundancy = waste, but for LED operating current, it is a savings. Driven at 70% current with a nominal maximum allowable, the sacrificed luminous flux is very limited. The benefits are enormous: slowing down light decay; extending life; improving reliability; higher energy efficiency. Designers should directly request the luminous flux. As for the wattage used, it should be decided by the manufacturer. This can promote manufacturers to pursue efficiency and stability, rather than blindly pushing up the wattage of the light source, while sacrificing efficiency and longevity. Light color In the era of traditional light sources, everyone only cares about "yellow light, white light" and does not care much about light color deviation. Anyway, the color temperature of the traditional light source is just a few. If you choose one, you will not go anywhere. In the era of LEDs, we found that the color of LEDs is different. Picture: This is the light distribution of the people, the color temperature is the same, this faint blue light... In view of this chaos, when the design company is making product selection, the specification states: "The color temperature deviation is within ±150K". They believe that this is the rule that can avoid red, green and green things. In fact, "not so simple"... In the figure, the light bars of different light colors are obviously warm white on the left side and greenish on the right side. According to the above statement, the human eye sees a clear difference, and the color temperature difference is definitely greater than 150K? The test results of both of them are like this The human eye looks completely different. The "correlated color temperature" is only 20K apart! Do you really think that... the color temperature on the right is 20K higher, is it seen by you? No, we usually say that the "color temperature" of the light source is actually quoted in the "Related Color Temperature" (CCT) column of the test report. The definition of these two parameters in "Architectural Lighting Design Standard GB50034-2013": 2.0.45 Color Temperature: When the chromaticity of the light source is the same as the chromaticity of the black body at a certain temperature, the absolute temperature of the black body is the color temperature of the light source. Also known as "chroma". The unit is open (K). - Greenhouse Film Made of durable low density polyethylene material heavy duty Clear Plastic Film cover Greenhouse Film Transparent Greenhouse Film,Transparent Blue Film,Plastic Greenhouse Film,Greenhouse Cover Film HEBEI TUOHUA METAL PRODUCTS CO.,LTD , https://www.penetting.com
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