LED video light

A, LED light power and light intensity

LED lighting for many different types of power from 1/20W W as well as to several tens of W ranging currents from milliamps to tens of thousands of mA range. And the luminous intensity is proportional to its power, the greater the power LED, luminous intensity is higher. For example, the LED lights 20 0.05W 1W equivalent of an LED. 3 1W LED light the equivalent of a 3W LED. Of course, with the power of the LED light intensity is different, different manufacturers of the product, the greater the difference in light intensity, 1W of LED lights approximately 70-100LM between. Most manufacturers only nominal power LED lights, no marked intensity. The light intensity of a good LED3W LED5W than the average even higher. Of course, its price is relatively higher.

Second, LED lamp color temperature and color temperature adjustment

LED lamp color temperature can be divided into warm white, neutral white and three white. LED warm white color temperature in the 2600K to 3700K, belonging to the warm light equivalent to the quartz lamp color temperature. Neutral white LED in the 3700K to 5000K color temperature between the standard color temperature than the low sunlight, looks soft and comfortable. The color temperature of white LED 5000K to 10000K in between the cool colors are light, bright visual sense. Color temperature is too high, but not suitable for photography, it is generally selected in the 6500K color temperature below the product. LED video light used good color temperature is selected by special tests, color temperature in the 5500K ± 300K or less. Currently there are two ways to change the color temperature, color temperature adjustment of a filter is adjusted by the general filter installed in the video light the lamp on, turn over cover before the head can, very easy to use. Another approach is applied in a number of LED lights some of the low color temperature (such as red) LED, so that low color temperature and white LED lighting LED mixed color temperature after the change, with the switch on or off of low color temperature LED to adjust the color temperature of light , this approach seems very advanced, but in fact will reduce the luminous efficiency, for example, three 3W LED lamp, with a nominal power of 9W, which is used to adjust the color temperature of a red LED, then, in the use of white when actually only two 3W LED in the work, the actual power is only 6W. Only the use of low color temperature, open the red LED lights only when the full power 9W.

Third, LED lights, and the number of luminous intensity

The number of LED is that many people care about, are that the LED light better, so dozens of pieces of LED video light even came into being hundreds of stars. Why should a lot of LED, the purpose is clear, it is hoped more powerful, higher brightness. Because we do not understand the nature of the LED can only know it from the number, the same power LED lights, the greater the number, the higher the brightness, so the LED better. However, due to the size of the power LED lights are different, we must first know the single application of the power LED light, video light can evaluate the power. 100 0.05W to 5W LED light the equivalent of an LED. Production with 100 LED video light of its much larger size, while the application a 5WLED video light volume on a much smaller production. So, whether in terms of use and carry, the LED video light 5W single absolute advantage. LED video light LED light intensity depends on the power and the number of product. 5W of LED video light 3 is equivalent to 300 0.05W LED video light. Of course, due to low power LED production process is simple and mature, large amount, so the cost is relatively low, with tens of millions of pieces of small power LED video light production costs are relatively lower.

Fourth, LED irradiation angle

Video light exposure has an effective angle of about 60 degrees to 80 degrees, if the irradiation angle is too small, the camera will appear black border. If the irradiation angle is too large, the light efficiency is reduced. Therefore, enterprises will be selected in accordance with the standard LED, LED meet the requirements of radiation angle requirements. Such as the choice of LED light irradiation angle of 60 degrees, if the light from 2 meters, then the LED will be on 2 meters 2.3 meters in diameter to form a light range. Of course, if the radiation angle can be adjusted better. Additional devices such as the LED video light by the light angle adjustable between a range. The smaller the angle illumination, the light intensity is higher.

Fifth, single and multi-stars the difference between LED light effect

There are centers all lighting intensity higher than the edge of the phenomenon of light intensity, LED video light is no exception. Speaking of 60 degrees above the single LED light in the range of 2 meters distance is about 2.3 meters in diameter of a circle. And the center of the light intensity must be greater than the edge. If the LED video light is composed by a number, then, is not a softer more even light it? Let's analyze the know. LED lights are each a 2 meters in diameter and 2.3 meters projected light range, a number of LED lights with light will overlap (of course, must overlap, otherwise out of range.) Because multiple LED lights are not in the same position, so the range will not light completely overlap. If a certain number of stars LED video light of the far left and far right LED distance 100mm, 2 meters then generated from the light non-overlapping range is 100mm. In this way, multiple LED light generated by the light diameter of 2.3 meters maximum range of only 0.1 m non-overlapping positions, so its LED light effects and is basically the same single, multi-LED lamps light the center of stars overlap, multi-LED lights stars Light edge and the edge of the overlap to form a multi-lamp light range almost completely overlap, the results with the same single LED lights, there is no light more uniform phenomenon.

VI, LED lamp life

LED lamp life is long and strong earthquake, life in general are more than 5 million hours. But how long LED lamp life is conditional, the most critical is the LED's heat. The reason why high-power LED light production difficulties, the main reason is the cooling conditions are harsh. The best LED working temperature below 60 ℃, the higher the temperature, the shorter its life. Working temperature 100 ℃ is the limit, if a long time to work in extreme temperatures, LED lights quickly broken. Not to mention 50,000 hours, or even 5 hours may be broken. LED video light with the production of top priority should solve the heat problem, especially in high-power small size of the video light, heat demand is higher. To a limited range of size and weight make the most effective heat dissipation efficiency, so the need to use new, high efficiency cooling technology. LED video light to make the life of the longest.

VII, LED lights and stability of the circuit

LED video light to ensure a good circuit design is also an important factor in their quality. LED lights have voltage requirements, voltage fluctuations can also cause changes in light intensity and color temperature, which is not conducive to applications, but also seriously affect the quality and life. If the voltage exceeds the rating of 20%, it will cause damage to LED lights. Therefore, there are certain requirements-in light of high intensity regulator circuit. A large range of good-in light of the regulator, even when the power voltage between 6V to 24V substantial changes still keep the original video light intensity and color temperature. Such as the Bai Ling BL-V3000 and BL-5500K video light, will be able to DC6V ~ DC24V voltage range.